Dear list I’d like to announce the new release of my library that embedds Csound into Haskell. This is quite a big release. Below is complete list of features

The 5.2 is out. Virtual pedalboards, arrays, new OSC, full support for mono synthesizers, patch skins, all GEN-routines are implemented

New features:

• Complete support for monophonic synthesizers:

  • The argument of mono synth was updated.

    Previously it was a pair of amplitude and frequency signals.
    But this representation doesn’t captures the notion of note retrigger.
    We can not create the mono-synt with sharp attacks.

    Now this is fixed. We can use adsr140 or adsrMonoSynt functions to create
    mono synths with fixed attacks

  • monoSco - for playing scores with mono-synths

  • monoSched - for playing event streams with mono synt

  • atSco and atSched now work for mono synth too

• The patch can change the skin. The Patch type has changed. Know it supports the change in common parameters.
  Right now the ccommon parameters include only Low-pass filter type. But this can be extended in future releases.

  The idea is that we can parametrize the patch with some common arguments so that use can tweak them
  without revriting the algorithm.

  The low-pass filter is a vital tool that defines the character of the synthesizer.
  With recent addition of several modern filter emulators (like Korg (korg_lp), or acid filter diode)
  it’s good to be able to quickly switch the filters. We can do it for patches with function

   setFilter :: ResonFilter -> Patch a -> Patch a
  

• Family of standard effects was added (see module Csound.Air.Fx.FxBox and the guide).
  The effects are kindly provided by Iain McCurdy (recoded from his original implementation in Csound).

  The effects have catchy names and are defined on wide variety of types. Let’s briefly discuss the naming conventions:

  • adele - analog delay

  • pongy - ping pong delay

  • tort - distortion

  • flan - flanger

  • fowler - Envelope follower

  • phasy - phaser

  • crusher - bit-crusher

  • chory - stereo chorus

  • tremy - tremolo

  • pany - panning

  • revsy - reverse playback

  Also there are set of presets that imply the notion of add a bit of effect or add a lot of effect.
  They are suffixed with number from 1 to 5. Like flan1 or tort3. Also if the effect support the
  tone knob (center frequency of LP filter) ter are suffixes b for bright color and m for muted color.
  For example tort2m or adele2b.

  The effects are just functions from signals to signals:

  dac $ hall 0.2 $ adele2 0.5 0.25 $ flan2 $ tort1m $ asigs
  

• UI widgets for standard effects.

  Alongside with effects there are functions to create widgets (UI-controls). They have the same naming convention
  only the prefix ui is added. For example: uiTort, uiAdele or uiHall. Also there are predefined presets like uiFlan2 or uiPhasy3.
  With presets we put the box in the initial state corresponding to the given preset. But lately we can change it with UI-controls.

  With this feature paired with functions fxHor, fxVer and fxGrid we can easily design our virtual pedalboards.

  It can be used like this:

    > let pedals = fxGrid 2 [uiFlan1, uiTort1, uiAdele2m 0.5 0.3, uiHall 0.25]
  
    > dac $ fxApply pedals $ (sawSeq [1, 0.5, 0.25] 2) * sqr 220
  

• Complete list of GEN routines. This release adds GEN:

    * 25 bpExps --  Construct functions from segments of exponential curves in breakpoint fashion., 
  
    * 27 bpLins --  Construct functions from segments of straight lines in breakpoint fashion.
  
    * wave waveletTab -- Generates a compactly supported wavelet function.
  
    * farey fareyTab -- Fills a table with the Farey Sequence Fn of the integer n.
  
    * sone soneTab -- Generate a table with values of the sone function.
  
    * exp expTab -- rescaleExpTab Generate a table with values on the exp function.
  
    * tanh tanhTab -- rescaleTanhTab Generate a table with values on the tanh function.
  
    * 52 readMultichannel -- Creates an interleaved multichannel table from the specified source tables, in the format expected by the ftconv opcode.
  
    * 41 randDist -- Generates a random list of numerical pairs.
  
    * 42 rangeDist Generates a random distribution of discrete ranges of values.
  
    * 40 tabDist -- Generates a random distribution using a distribution histogram.
  
    * 43 readPvocex -- Loads a PVOCEX file containing a PV analysis.
  
    * 28 readTrajectoryFile -- Reads a text file which contains a time-tagged trajectory.
  
    * 24 readNumTab --  Reads numeric values from another allocated function-table and rescales them.
  
    * 21 dist, uniDist, linDist, triDist, expDist, biexpDist, gaussDist, cauchyDist, pcauchyDist, betaDist, weibullDist, poissonDist -- Generates tables of different random distributions.
  
    * 18 tabseg -- Writes composite waveforms made up of pre-existing waveforms. 
  
    * 31 mixOnTab -- Mixes any waveform specified in an existing table. 
  
    * 32 mixTabs -- Mixes any waveform, resampled with either FFT or linear interpolation. 
  
    * 30 tabHarmonics -- Generates harmonic partials by analyzing an existing table.
  

  See the Csound docs for details of what table they produce.
  Also the signatures for windows creating tabs was updated. It became more specific.

• Global arguments defined with Macros. We can create a Csound .csd file in our program
  and after that we can run it on anything which has Csound installed. It’s desirable to be able
  to tweak some parameters after rendering or to have some global config arguments.
  In Csound we can do it with macroses. We can use macros name in the code adn then we can change the value of the
  macros with command line flag --omacro:Name=Value.

  From now on it’s possible to do it with Haskell too. There are functions:

    readMacrosDouble  :: String -> Double -> D
    readMacrosInt     :: String -> Int -> D
    readMacrosString  :: String -> String -> Str
  

  The first argument is a macro name and the second one is the default value
  which is used if no value is set in the flags.

• The useful function to trigger an table based envelope. It comes in two flavors. One is driven with event stream
  and another with just a signal. It’s on when signal is non zero.

   trigTab :: Tab -> Sig -> Sig -> Sig
   trigTab tab duration triggerSignal 
  
   type Tick = Evt Unit
  
   trigTabEvt :: Tab -> Sig -> Tick -> Sig
   trigTabEvt tab duration triggerSignal
  

• New functions for UI widgets.

  • We can change the relative size of the window. If the widget is too large or too small
    we can rescale it with functions:

      type ScaleFactor = (Double, Double)
    
      resizeGui :: ScaleFactor -> Gui -> Gui
    
      resizeSource :: ScaleFactor -> Source a -> Source a
    

    They change the default minimal sizes for all widgets that are contained within the given widget.

  • Grid layout. We are familiar with functions ver and hor. With them we can place the widgets vertically or horizontally.
    But now it’s also possible to place the widgets on the grid:

     grid :: Int -> [Gui] -> Gui
    

    The first argument specifies the number of elements in each row.

    There are handy grid functions for combining source-widgets:

     gridLifts :: Int -> ([a] -> b) -> [Source a] -> Source b
    

    It applies a list based function to a list of value producer widgets and places all widgets on the grid.
    The first argument is the same as with grid.

  • UI default sizes are a bit smaller now.

• It compiles on GHC-7.8 again

• New function whileRef for imperative while loops.

    whileRef :: Tuple st => st -> (st -> SE BoolSig) -> (st -> SE st) -> SE ()
    whileRef initState condition body
  

  It’s used in this way. It stores the initial state in the reference (local variable)
  and the it starts to implement the body while the predicate returns true. Notice that
  the body is also updates the state.

• New functions for OSC that make it easy to read OSC messages that are interpreted like signals.
  For example we have an OSC-routine for volume control. When message happens we update the value.
  It would be good to be able to just read the signal:

    listenOscVal :: (Tuple a, OscVal a) => OscRef -> String -> a -> SE a
    listenOscVal oscRef address initValue
  

  There are two useful aliases for this function. They read signals and pairs of signals:

    listenOscSig  :: OscRef -> String -> Sig  -> SE Sig
    listenOscSig2 :: OscRef -> String -> Sig2 -> SE Sig2
  

• Adds loopers that preserve attacks when rescaling by tempo.
  They are based on temposcal Csound algorithm.
  The previous loopers were based on the mincer algorithm. It uses FFT under the hood which can smooth out the sharp attacks.
  It’s undesirable for percussive loops. The temposcal adds the feature of preserving attacks.

  See the functions:

   -- | reads stereo files with scaling
   scaleWav ::  Fidelity -> TempoSig -> PitchSig -> String -> Sig2
  
   -- | reads mono files with scaling
   scaleWav1 :: Fidelity -> TempoSig -> PitchSig -> String -> Sig
  

  Also there are presets for scaling the drums or harmonic instruments (they set the appropriate fidelity):

   scaleDrum, scaleHarm :: TempoSig -> PitchSig -> String -> Sig2
  

  The fidelity is the degree of the size of FFT window. The formula for window size: 2 ** (fidelity + 11).

  Also the corresponding functions are added for csound-sampler.

   wavScale :: Fidelity -> TempoSig -> PitchSig -> String -> Sam
   wavScale1 :: Fidelity -> TempoSig -> PitchSig -> String -> Sam
  
   drumScale, harmScale :: TempoSig -> PitchSig -> String -> Sam
  

• The type signatures for echo and pingPong where simplified. Now they don’t use side effects
  and look like pure functions:

    echo :: MaxDelayTime -> Feedback -> Sig -> Sig
    pingPong :: DelayTime -> Feedback -> Balance -> Sig2 -> Sig2
  

• Type signatures for functions randSkip and freqOf where generalized. Now they use signals for probabilities
  instead of constant numbers. So we can change the probability of skip of the event during performance.

• New monophonic instruments are added in csound-catalog: fmBass1, fmBass2, dafunkLead and one polyphonic celloSynt.
  Those instrument serve a good example for building monophonic synthesizers with sharp attacks.

Experimental features:

• Arrays, with all opcodes and functional traversals. See the guide for details details.

• Imperative style instruments.

  With imperative style instruments we can create and invoke the instruments in Csound way.
  we can create an instrument and get it’s unique identifier. Than we can schedule a note by that identifier.

  We can create an instrument that produces a sound with function:

    newOutInstr :: (Arg a, Sigs b) => (a -> SE b) -> SE (InstrRef a, b)
  

  It takes in a body of the instrument and gives back an instrument reference and
  a signal where the output is going to be written. Then we can invoke the notes just
  like we do it in the Csound with function scheduleEvent:

    scheduleEvent :: Arg a => InstrRef a -> D -> D -> a -> SE ()
    scheduleEvent instrRed delayStartTime duration arguments
  

  It takes in instrument reference, start time from the time of invocation, duration (all in seconds) and miscellaneous arguments.
  Notice that the instrument reference is parametrized by the type of arguments. This way we can not feed the wrong messages to the instrument.

  Also we can create procedures that produce no output but do something useful:

    newInstr :: Arg a => (a -> SE ()) -> SE (InstrRef a)
  

Happy Csounding!
Anton

Links to the library: https://hackage.haskell.org/package/csound-expression

See the guide at github: https://github.com/spell-music/csound-expression

​

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Compliments and congratulations!

Tarmo

22.03.2017 20:45 kirjutas kuupäeval "Anton Kholomiov" <anton.kholomiov@gmail.com>:

Dear list I’d like to announce the new release of my library that embedds Csound into Haskell. This is quite a big release. Below is complete list of features

The 5.2 is out. Virtual pedalboards, arrays, new OSC, full support for mono synthesizers, patch skins, all GEN-routines are implemented

New features:

• Complete support for monophonic synthesizers:

  • The argument of mono synth was updated.

    Previously it was a pair of amplitude and frequency signals.
    But this representation doesn’t captures the notion of note retrigger.
    We can not create the mono-synt with sharp attacks.

    Now this is fixed. We can use adsr140 or adsrMonoSynt functions to create
    mono synths with fixed attacks

  • monoSco - for playing scores with mono-synths

  • monoSched - for playing event streams with mono synt

  • atSco and atSched now work for mono synth too

• The patch can change the skin. The Patch type has changed. Know it supports the change in common parameters.
  Right now the ccommon parameters include only Low-pass filter type. But this can be extended in future releases.

  The idea is that we can parametrize the patch with some common arguments so that use can tweak them
  without revriting the algorithm.

  The low-pass filter is a vital tool that defines the character of the synthesizer.
  With recent addition of several modern filter emulators (like Korg (korg_lp), or acid filter diode)
  it’s good to be able to quickly switch the filters. We can do it for patches with function

   setFilter :: ResonFilter -> Patch a -> Patch a
  

• Family of standard effects was added (see module Csound.Air.Fx.FxBox and the guide).
  The effects are kindly provided by Iain McCurdy (recoded from his original implementation in Csound).

  The effects have catchy names and are defined on wide variety of types. Let’s briefly discuss the naming conventions:

  • adele - analog delay

  • pongy - ping pong delay

  • tort - distortion

  • flan - flanger

  • fowler - Envelope follower

  • phasy - phaser

  • crusher - bit-crusher

  • chory - stereo chorus

  • tremy - tremolo

  • pany - panning

  • revsy - reverse playback

  Also there are set of presets that imply the notion of add a bit of effect or add a lot of effect.
  They are suffixed with number from 1 to 5. Like flan1 or tort3. Also if the effect support the
  tone knob (center frequency of LP filter) ter are suffixes b for bright color and m for muted color.
  For example tort2m or adele2b.

  The effects are just functions from signals to signals:

  dac $ hall 0.2 $ adele2 0.5 0.25 $ flan2 $ tort1m $ asigs
  

• UI widgets for standard effects.

  Alongside with effects there are functions to create widgets (UI-controls). They have the same naming convention
  only the prefix ui is added. For example: uiTort, uiAdele or uiHall. Also there are predefined presets like uiFlan2 or uiPhasy3.
  With presets we put the box in the initial state corresponding to the given preset. But lately we can change it with UI-controls.

  With this feature paired with functions fxHor, fxVer and fxGrid we can easily design our virtual pedalboards.

  It can be used like this:

    > let pedals = fxGrid 2 [uiFlan1, uiTort1, uiAdele2m 0.5 0.3, uiHall 0.25]
  
    > dac $ fxApply pedals $ (sawSeq [1, 0.5, 0.25] 2) * sqr 220
  

• Complete list of GEN routines. This release adds GEN:

    * 25 bpExps --  Construct functions from segments of exponential curves in breakpoint fashion., 
  
    * 27 bpLins --  Construct functions from segments of straight lines in breakpoint fashion.
  
    * wave waveletTab -- Generates a compactly supported wavelet function.
  
    * farey fareyTab -- Fills a table with the Farey Sequence Fn of the integer n.
  
    * sone soneTab -- Generate a table with values of the sone function.
  
    * exp expTab -- rescaleExpTab Generate a table with values on the exp function.
  
    * tanh tanhTab -- rescaleTanhTab Generate a table with values on the tanh function.
  
    * 52 readMultichannel -- Creates an interleaved multichannel table from the specified source tables, in the format expected by the ftconv opcode.
  
    * 41 randDist -- Generates a random list of numerical pairs.
  
    * 42 rangeDist Generates a random distribution of discrete ranges of values.
  
    * 40 tabDist -- Generates a random distribution using a distribution histogram.
  
    * 43 readPvocex -- Loads a PVOCEX file containing a PV analysis.
  
    * 28 readTrajectoryFile -- Reads a text file which contains a time-tagged trajectory.
  
    * 24 readNumTab --  Reads numeric values from another allocated function-table and rescales them.
  
    * 21 dist, uniDist, linDist, triDist, expDist, biexpDist, gaussDist, cauchyDist, pcauchyDist, betaDist, weibullDist, poissonDist -- Generates tables of different random distributions.
  
    * 18 tabseg -- Writes composite waveforms made up of pre-existing waveforms. 
  
    * 31 mixOnTab -- Mixes any waveform specified in an existing table. 
  
    * 32 mixTabs -- Mixes any waveform, resampled with either FFT or linear interpolation. 
  
    * 30 tabHarmonics -- Generates harmonic partials by analyzing an existing table.
  

  See the Csound docs for details of what table they produce.
  Also the signatures for windows creating tabs was updated. It became more specific.

• Global arguments defined with Macros. We can create a Csound .csd file in our program
  and after that we can run it on anything which has Csound installed. It’s desirable to be able
  to tweak some parameters after rendering or to have some global config arguments.
  In Csound we can do it with macroses. We can use macros name in the code adn then we can change the value of the
  macros with command line flag --omacro:Name=Value.

  From now on it’s possible to do it with Haskell too. There are functions:

    readMacrosDouble  :: String -> Double -> D
    readMacrosInt     :: String -> Int -> D
    readMacrosString  :: String -> String -> Str
  

  The first argument is a macro name and the second one is the default value
  which is used if no value is set in the flags.

• The useful function to trigger an table based envelope. It comes in two flavors. One is driven with event stream
  and another with just a signal. It’s on when signal is non zero.

   trigTab :: Tab -> Sig -> Sig -> Sig
   trigTab tab duration triggerSignal 
  
   type Tick = Evt Unit
  
   trigTabEvt :: Tab -> Sig -> Tick -> Sig
   trigTabEvt tab duration triggerSignal
  

• New functions for UI widgets.

  • We can change the relative size of the window. If the widget is too large or too small
    we can rescale it with functions:

      type ScaleFactor = (Double, Double)
    
      resizeGui :: ScaleFactor -> Gui -> Gui
    
      resizeSource :: ScaleFactor -> Source a -> Source a
    

    They change the default minimal sizes for all widgets that are contained within the given widget.

  • Grid layout. We are familiar with functions ver and hor. With them we can place the widgets vertically or horizontally.
    But now it’s also possible to place the widgets on the grid:

     grid :: Int -> [Gui] -> Gui
    

    The first argument specifies the number of elements in each row.

    There are handy grid functions for combining source-widgets:

     gridLifts :: Int -> ([a] -> b) -> [Source a] -> Source b
    

    It applies a list based function to a list of value producer widgets and places all widgets on the grid.
    The first argument is the same as with grid.

  • UI default sizes are a bit smaller now.

• It compiles on GHC-7.8 again

• New function whileRef for imperative while loops.

    whileRef :: Tuple st => st -> (st -> SE BoolSig) -> (st -> SE st) -> SE ()
    whileRef initState condition body
  

  It’s used in this way. It stores the initial state in the reference (local variable)
  and the it starts to implement the body while the predicate returns true. Notice that
  the body is also updates the state.

• New functions for OSC that make it easy to read OSC messages that are interpreted like signals.
  For example we have an OSC-routine for volume control. When message happens we update the value.
  It would be good to be able to just read the signal:

    listenOscVal :: (Tuple a, OscVal a) => OscRef -> String -> a -> SE a
    listenOscVal oscRef address initValue
  

  There are two useful aliases for this function. They read signals and pairs of signals:

    listenOscSig  :: OscRef -> String -> Sig  -> SE Sig
    listenOscSig2 :: OscRef -> String -> Sig2 -> SE Sig2
  

• Adds loopers that preserve attacks when rescaling by tempo.
  They are based on temposcal Csound algorithm.
  The previous loopers were based on the mincer algorithm. It uses FFT under the hood which can smooth out the sharp attacks.
  It’s undesirable for percussive loops. The temposcal adds the feature of preserving attacks.

  See the functions:

   -- | reads stereo files with scaling
   scaleWav ::  Fidelity -> TempoSig -> PitchSig -> String -> Sig2
  
   -- | reads mono files with scaling
   scaleWav1 :: Fidelity -> TempoSig -> PitchSig -> String -> Sig
  

  Also there are presets for scaling the drums or harmonic instruments (they set the appropriate fidelity):

   scaleDrum, scaleHarm :: TempoSig -> PitchSig -> String -> Sig2
  

  The fidelity is the degree of the size of FFT window. The formula for window size: 2 ** (fidelity + 11).

  Also the corresponding functions are added for csound-sampler.

   wavScale :: Fidelity -> TempoSig -> PitchSig -> String -> Sam
   wavScale1 :: Fidelity -> TempoSig -> PitchSig -> String -> Sam
  
   drumScale, harmScale :: TempoSig -> PitchSig -> String -> Sam
  

• The type signatures for echo and pingPong where simplified. Now they don’t use side effects
  and look like pure functions:

    echo :: MaxDelayTime -> Feedback -> Sig -> Sig
    pingPong :: DelayTime -> Feedback -> Balance -> Sig2 -> Sig2
  

• Type signatures for functions randSkip and freqOf where generalized. Now they use signals for probabilities
  instead of constant numbers. So we can change the probability of skip of the event during performance.

• New monophonic instruments are added in csound-catalog: fmBass1, fmBass2, dafunkLead and one polyphonic celloSynt.
  Those instrument serve a good example for building monophonic synthesizers with sharp attacks.

Experimental features:

• Arrays, with all opcodes and functional traversals. See the guide for details details.

• Imperative style instruments.

  With imperative style instruments we can create and invoke the instruments in Csound way.
  we can create an instrument and get it’s unique identifier. Than we can schedule a note by that identifier.

  We can create an instrument that produces a sound with function:

    newOutInstr :: (Arg a, Sigs b) => (a -> SE b) -> SE (InstrRef a, b)
  

  It takes in a body of the instrument and gives back an instrument reference and
  a signal where the output is going to be written. Then we can invoke the notes just
  like we do it in the Csound with function scheduleEvent:

    scheduleEvent :: Arg a => InstrRef a -> D -> D -> a -> SE ()
    scheduleEvent instrRed delayStartTime duration arguments
  

  It takes in instrument reference, start time from the time of invocation, duration (all in seconds) and miscellaneous arguments.
  Notice that the instrument reference is parametrized by the type of arguments. This way we can not feed the wrong messages to the instrument.

  Also we can create procedures that produce no output but do something useful:

    newInstr :: Arg a => (a -> SE ()) -> SE (InstrRef a)
  

Happy Csounding!
Anton

Links to the library: https://hackage.haskell.org/package/csound-expression

See the guide at github: https://github.com/spell-music/csound-expression

​

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Seems very interesting. I hope to study this work in this life also...

Il 23/03/2017 16:40, Steven Yi ha scritto:

+1 Congratulations and very inspiring work!

On Thu, Mar 23, 2017 at 4:46 AM, Anton Kholomiov
<anton.kholomiov@gmail.com> wrote:

Thanks, Tarmo!

2017-03-23 10:12 GMT+03:00 Tarmo Johannes <trmjhnns@gmail.com>:

Compliments and congratulations!
Tarmo

22.03.2017 20:45 kirjutas kuupäeval "Anton Kholomiov"
<anton.kholomiov@gmail.com>:

Dear list I’d like to announce the new release of my library that embedds
Csound into Haskell. This is quite a big release. Below is complete list of
features

The 5.2 is out. Virtual pedalboards, arrays, new OSC, full support for
mono synthesizers, patch skins, all GEN-routines are implemented

New features:

Complete support for monophonic synthesizers:

The argument of mono synth was updated.

Previously it was a pair of amplitude and frequency signals.
But this representation doesn’t captures the notion of note retrigger.
We can not create the mono-synt with sharp attacks.

Now this is fixed. We can use adsr140 or adsrMonoSynt functions to create
mono synths with fixed attacks

monoSco - for playing scores with mono-synths

monoSched - for playing event streams with mono synt

atSco and atSched now work for mono synth too

The patch can change the skin. The Patch type has changed. Know it
supports the change in common parameters.
Right now the ccommon parameters include only Low-pass filter type. But
this can be extended in future releases.

The idea is that we can parametrize the patch with some common arguments
so that use can tweak them
without revriting the algorithm.

The low-pass filter is a vital tool that defines the character of the
synthesizer.
With recent addition of several modern filter emulators (like Korg
(korg_lp), or acid filter diode)
it’s good to be able to quickly switch the filters. We can do it for
patches with function

  setFilter :: ResonFilter -> Patch a -> Patch a

Family of standard effects was added (see module Csound.Air.Fx.FxBox and
the guide).
The effects are kindly provided by Iain McCurdy (recoded from his
original implementation in Csound).

The effects have catchy names and are defined on wide variety of types.
Let’s briefly discuss the naming conventions:

adele - analog delay

pongy - ping pong delay

tort - distortion

flan - flanger

fowler - Envelope follower

phasy - phaser

crusher - bit-crusher

chory - stereo chorus

tremy - tremolo

pany - panning

revsy - reverse playback

Also there are set of presets that imply the notion of add a bit of
effect or add a lot of effect.
They are suffixed with number from 1 to 5. Like flan1 or tort3. Also if
the effect support the
tone knob (center frequency of LP filter) ter are suffixes b for bright
color and m for muted color.
For example tort2m or adele2b.

The effects are just functions from signals to signals:

dac $ hall 0.2 $ adele2 0.5 0.25 $ flan2 $ tort1m $ asigs

UI widgets for standard effects.

Alongside with effects there are functions to create widgets
(UI-controls). They have the same naming convention
only the prefix ui is added. For example: uiTort, uiAdele or uiHall. Also
there are predefined presets like uiFlan2 or uiPhasy3.
With presets we put the box in the initial state corresponding to the
given preset. But lately we can change it with UI-controls.

With this feature paired with functions fxHor, fxVer and fxGrid we can
easily design our virtual pedalboards.

It can be used like this:

   > let pedals = fxGrid 2 [uiFlan1, uiTort1, uiAdele2m 0.5 0.3, uiHall
0.25]

   > dac $ fxApply pedals $ (sawSeq [1, 0.5, 0.25] 2) * sqr 220

Complete list of GEN routines. This release adds GEN:

   * 25 bpExps --  Construct functions from segments of exponential curves
in breakpoint fashion.,

   * 27 bpLins --  Construct functions from segments of straight lines in
breakpoint fashion.

   * wave waveletTab -- Generates a compactly supported wavelet function.

   * farey fareyTab -- Fills a table with the Farey Sequence Fn of the
integer n.

   * sone soneTab -- Generate a table with values of the sone function.

   * exp expTab -- rescaleExpTab Generate a table with values on the exp
function.

   * tanh tanhTab -- rescaleTanhTab Generate a table with values on the
tanh function.

   * 52 readMultichannel -- Creates an interleaved multichannel table from
the specified source tables, in the format expected by the ftconv opcode.

   * 41 randDist -- Generates a random list of numerical pairs.

   * 42 rangeDist Generates a random distribution of discrete ranges of
values.

   * 40 tabDist -- Generates a random distribution using a distribution
histogram.

   * 43 readPvocex -- Loads a PVOCEX file containing a PV analysis.

   * 28 readTrajectoryFile -- Reads a text file which contains a
time-tagged trajectory.

   * 24 readNumTab --  Reads numeric values from another allocated
function-table and rescales them.

   * 21 dist, uniDist, linDist, triDist, expDist, biexpDist, gaussDist,
cauchyDist, pcauchyDist, betaDist, weibullDist, poissonDist -- Generates
tables of different random distributions.

   * 18 tabseg -- Writes composite waveforms made up of pre-existing
waveforms.

   * 31 mixOnTab -- Mixes any waveform specified in an existing table.

   * 32 mixTabs -- Mixes any waveform, resampled with either FFT or linear
interpolation.

   * 30 tabHarmonics -- Generates harmonic partials by analyzing an
existing table.

See the Csound docs for details of what table they produce.
Also the signatures for windows creating tabs was updated. It became more
specific.

Global arguments defined with Macros. We can create a Csound .csd file in
our program
and after that we can run it on anything which has Csound installed. It’s
desirable to be able
to tweak some parameters after rendering or to have some global config
arguments.
In Csound we can do it with macroses. We can use macros name in the code
adn then we can change the value of the
macros with command line flag --omacro:Name=Value.

 From now on it’s possible to do it with Haskell too. There are functions:

   readMacrosDouble  :: String -> Double -> D
   readMacrosInt     :: String -> Int -> D
   readMacrosString  :: String -> String -> Str

The first argument is a macro name and the second one is the default
value
which is used if no value is set in the flags.

The useful function to trigger an table based envelope. It comes in two
flavors. One is driven with event stream
and another with just a signal. It’s on when signal is non zero.

  trigTab :: Tab -> Sig -> Sig -> Sig
  trigTab tab duration triggerSignal

  type Tick = Evt Unit

  trigTabEvt :: Tab -> Sig -> Tick -> Sig
  trigTabEvt tab duration triggerSignal

New functions for UI widgets.

We can change the relative size of the window. If the widget is too large
or too small
we can rescale it with functions:

   type ScaleFactor = (Double, Double)

   resizeGui :: ScaleFactor -> Gui -> Gui

   resizeSource :: ScaleFactor -> Source a -> Source a

They change the default minimal sizes for all widgets that are contained
within the given widget.

Grid layout. We are familiar with functions ver and hor. With them we can
place the widgets vertically or horizontally.
But now it’s also possible to place the widgets on the grid:

  grid :: Int -> [Gui] -> Gui

The first argument specifies the number of elements in each row.

There are handy grid functions for combining source-widgets:

  gridLifts :: Int -> ([a] -> b) -> [Source a] -> Source b

It applies a list based function to a list of value producer widgets and
places all widgets on the grid.
The first argument is the same as with grid.

UI default sizes are a bit smaller now.

It compiles on GHC-7.8 again

New function whileRef for imperative while loops.

   whileRef :: Tuple st => st -> (st -> SE BoolSig) -> (st -> SE st) -> SE
()
   whileRef initState condition body

It’s used in this way. It stores the initial state in the reference
(local variable)
and the it starts to implement the body while the predicate returns true.
Notice that
the body is also updates the state.

New functions for OSC that make it easy to read OSC messages that are
interpreted like signals.
For example we have an OSC-routine for volume control. When message
happens we update the value.
It would be good to be able to just read the signal:

   listenOscVal :: (Tuple a, OscVal a) => OscRef -> String -> a -> SE a
   listenOscVal oscRef address initValue

There are two useful aliases for this function. They read signals and
pairs of signals:

   listenOscSig  :: OscRef -> String -> Sig  -> SE Sig
   listenOscSig2 :: OscRef -> String -> Sig2 -> SE Sig2

Adds loopers that preserve attacks when rescaling by tempo.
They are based on temposcal Csound algorithm.
The previous loopers were based on the mincer algorithm. It uses FFT
under the hood which can smooth out the sharp attacks.
It’s undesirable for percussive loops. The temposcal adds the feature of
preserving attacks.

See the functions:

  -- | reads stereo files with scaling
  scaleWav ::  Fidelity -> TempoSig -> PitchSig -> String -> Sig2

  -- | reads mono files with scaling
  scaleWav1 :: Fidelity -> TempoSig -> PitchSig -> String -> Sig

Also there are presets for scaling the drums or harmonic instruments
(they set the appropriate fidelity):

  scaleDrum, scaleHarm :: TempoSig -> PitchSig -> String -> Sig2

The fidelity is the degree of the size of FFT window. The formula for
window size: 2 ** (fidelity + 11).

Also the corresponding functions are added for csound-sampler.

  wavScale :: Fidelity -> TempoSig -> PitchSig -> String -> Sam
  wavScale1 :: Fidelity -> TempoSig -> PitchSig -> String -> Sam

  drumScale, harmScale :: TempoSig -> PitchSig -> String -> Sam

The type signatures for echo and pingPong where simplified. Now they
don’t use side effects
and look like pure functions:

   echo :: MaxDelayTime -> Feedback -> Sig -> Sig
   pingPong :: DelayTime -> Feedback -> Balance -> Sig2 -> Sig2

Type signatures for functions randSkip and freqOf where generalized. Now
they use signals for probabilities
instead of constant numbers. So we can change the probability of skip of
the event during performance.

New monophonic instruments are added in csound-catalog: fmBass1, fmBass2,
dafunkLead and one polyphonic celloSynt.
Those instrument serve a good example for building monophonic
synthesizers with sharp attacks.

Experimental features:

Arrays, with all opcodes and functional traversals. See the guide for
details details.

Imperative style instruments.

With imperative style instruments we can create and invoke the
instruments in Csound way.
we can create an instrument and get it’s unique identifier. Than we can
schedule a note by that identifier.

We can create an instrument that produces a sound with function:

   newOutInstr :: (Arg a, Sigs b) => (a -> SE b) -> SE (InstrRef a, b)

It takes in a body of the instrument and gives back an instrument
reference and
a signal where the output is going to be written. Then we can invoke the
notes just
like we do it in the Csound with function scheduleEvent:

   scheduleEvent :: Arg a => InstrRef a -> D -> D -> a -> SE ()
   scheduleEvent instrRed delayStartTime duration arguments

It takes in instrument reference, start time from the time of invocation,
duration (all in seconds) and miscellaneous arguments.
Notice that the instrument reference is parametrized by the type of
arguments. This way we can not feed the wrong messages to the instrument.

Also we can create procedures that produce no output but do something
useful:

   newInstr :: Arg a => (a -> SE ()) -> SE (InstrRef a)

Happy Csounding!
Anton

Links to the library:
https://hackage.haskell.org/package/csound-expression

See the guide at github: https://github.com/spell-music/csound-expression

Csound mailing list Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
https://github.com/csound/csound/issues Discussions of bugs and features can
be posted here

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Discussions of bugs and features can be posted here

Sorry for late reply! That's wonderful that the adsr140 has been
useful.  I've been using a variant of it in a recent work, but I've
been meaning to do some experimentation with writing a monosynth and
use adsr140 as well.

On Fri, Mar 24, 2017 at 2:53 AM, Anton Kholomiov

<anton.kholomiov@gmail.com> wrote:
> Thanks, Andrea and Steven
>
> Steven, your udo adsr140 was used in this release. I've added monophonic
> instruments
> and it comes very handy to get the envelopes right for them.
>
> 2017-03-24 0:56 GMT+03:00 Andrea Strappa <a_strappa@tin.it>:
>>
>> Seems very interesting. I hope to study this work in this life also...
>>
>>
>>
>> Il 23/03/2017 16:40, Steven Yi ha scritto:
>>>
>>> +1 Congratulations and very inspiring work!
>>>
>>> On Thu, Mar 23, 2017 at 4:46 AM, Anton Kholomiov
>>> <anton.kholomiov@gmail.com> wrote:
>>>>
>>>> Thanks, Tarmo!
>>>>
>>>> 2017-03-23 10:12 GMT+03:00 Tarmo Johannes <trmjhnns@gmail.com>:
>>>>>
>>>>> Compliments and congratulations!
>>>>> Tarmo
>>>>>
>>>>> 22.03.2017 20:45 kirjutas kuupäeval "Anton Kholomiov"
>>>>> <anton.kholomiov@gmail.com>:
>>>>>>
>>>>>> Dear list I’d like to announce the new release of my library that
>>>>>> embedds
>>>>>> Csound into Haskell. This is quite a big release. Below is complete
>>>>>> list of
>>>>>> features
>>>>>>
>>>>>> The 5.2 is out. Virtual pedalboards, arrays, new OSC, full support for
>>>>>> mono synthesizers, patch skins, all GEN-routines are implemented
>>>>>>
>>>>>> New features:
>>>>>>
>>>>>> Complete support for monophonic synthesizers:
>>>>>>
>>>>>> The argument of mono synth was updated.
>>>>>>
>>>>>> Previously it was a pair of amplitude and frequency signals.
>>>>>> But this representation doesn’t captures the notion of note retrigger.
>>>>>> We can not create the mono-synt with sharp attacks.
>>>>>>
>>>>>> Now this is fixed. We can use adsr140 or adsrMonoSynt functions to
>>>>>> create
>>>>>> mono synths with fixed attacks
>>>>>>
>>>>>> monoSco - for playing scores with mono-synths
>>>>>>
>>>>>> monoSched - for playing event streams with mono synt
>>>>>>
>>>>>> atSco and atSched now work for mono synth too
>>>>>>
>>>>>> The patch can change the skin. The Patch type has changed. Know it
>>>>>> supports the change in common parameters.
>>>>>> Right now the ccommon parameters include only Low-pass filter type.
>>>>>> But
>>>>>> this can be extended in future releases.
>>>>>>
>>>>>> The idea is that we can parametrize the patch with some common
>>>>>> arguments
>>>>>> so that use can tweak them
>>>>>> without revriting the algorithm.
>>>>>>
>>>>>> The low-pass filter is a vital tool that defines the character of the
>>>>>> synthesizer.
>>>>>> With recent addition of several modern filter emulators (like Korg
>>>>>> (korg_lp), or acid filter diode)
>>>>>> it’s good to be able to quickly switch the filters. We can do it for
>>>>>> patches with function
>>>>>>
>>>>>>   setFilter :: ResonFilter -> Patch a -> Patch a
>>>>>>
>>>>>> Family of standard effects was added (see module Csound.Air.Fx.FxBox
>>>>>> and
>>>>>> the guide).
>>>>>> The effects are kindly provided by Iain McCurdy (recoded from his
>>>>>> original implementation in Csound).
>>>>>>
>>>>>> The effects have catchy names and are defined on wide variety of
>>>>>> types.
>>>>>> Let’s briefly discuss the naming conventions:
>>>>>>
>>>>>> adele - analog delay
>>>>>>
>>>>>> pongy - ping pong delay
>>>>>>
>>>>>> tort - distortion
>>>>>>
>>>>>> flan - flanger
>>>>>>
>>>>>> fowler - Envelope follower
>>>>>>
>>>>>> phasy - phaser
>>>>>>
>>>>>> crusher - bit-crusher
>>>>>>
>>>>>> chory - stereo chorus
>>>>>>
>>>>>> tremy - tremolo
>>>>>>
>>>>>> pany - panning
>>>>>>
>>>>>> revsy - reverse playback
>>>>>>
>>>>>> Also there are set of presets that imply the notion of add a bit of
>>>>>> effect or add a lot of effect.
>>>>>> They are suffixed with number from 1 to 5. Like flan1 or tort3. Also
>>>>>> if
>>>>>> the effect support the
>>>>>> tone knob (center frequency of LP filter) ter are suffixes b for
>>>>>> bright
>>>>>> color and m for muted color.
>>>>>> For example tort2m or adele2b.
>>>>>>
>>>>>> The effects are just functions from signals to signals:
>>>>>>
>>>>>> dac $ hall 0.2 $ adele2 0.5 0.25 $ flan2 $ tort1m $ asigs
>>>>>>
>>>>>> UI widgets for standard effects.
>>>>>>
>>>>>> Alongside with effects there are functions to create widgets
>>>>>> (UI-controls). They have the same naming convention
>>>>>> only the prefix ui is added. For example: uiTort, uiAdele or uiHall.
>>>>>> Also
>>>>>> there are predefined presets like uiFlan2 or uiPhasy3.
>>>>>> With presets we put the box in the initial state corresponding to the
>>>>>> given preset. But lately we can change it with UI-controls.
>>>>>>
>>>>>> With this feature paired with functions fxHor, fxVer and fxGrid we can
>>>>>> easily design our virtual pedalboards.
>>>>>>
>>>>>> It can be used like this:
>>>>>>
>>>>>>    > let pedals = fxGrid 2 [uiFlan1, uiTort1, uiAdele2m 0.5 0.3,
>>>>>> uiHall
>>>>>> 0.25]
>>>>>>
>>>>>>    > dac $ fxApply pedals $ (sawSeq [1, 0.5, 0.25] 2) * sqr 220
>>>>>>
>>>>>> Complete list of GEN routines. This release adds GEN:
>>>>>>
>>>>>>    * 25 bpExps --  Construct functions from segments of exponential
>>>>>> curves
>>>>>> in breakpoint fashion.,
>>>>>>
>>>>>>    * 27 bpLins --  Construct functions from segments of straight lines
>>>>>> in
>>>>>> breakpoint fashion.
>>>>>>
>>>>>>    * wave waveletTab -- Generates a compactly supported wavelet
>>>>>> function.
>>>>>>
>>>>>>    * farey fareyTab -- Fills a table with the Farey Sequence Fn of the
>>>>>> integer n.
>>>>>>
>>>>>>    * sone soneTab -- Generate a table with values of the sone
>>>>>> function.
>>>>>>
>>>>>>    * exp expTab -- rescaleExpTab Generate a table with values on the
>>>>>> exp
>>>>>> function.
>>>>>>
>>>>>>    * tanh tanhTab -- rescaleTanhTab Generate a table with values on
>>>>>> the
>>>>>> tanh function.
>>>>>>
>>>>>>    * 52 readMultichannel -- Creates an interleaved multichannel table
>>>>>> from
>>>>>> the specified source tables, in the format expected by the ftconv
>>>>>> opcode.
>>>>>>
>>>>>>    * 41 randDist -- Generates a random list of numerical pairs.
>>>>>>
>>>>>>    * 42 rangeDist Generates a random distribution of discrete ranges
>>>>>> of
>>>>>> values.
>>>>>>
>>>>>>    * 40 tabDist -- Generates a random distribution using a
>>>>>> distribution
>>>>>> histogram.
>>>>>>
>>>>>>    * 43 readPvocex -- Loads a PVOCEX file containing a PV analysis.
>>>>>>
>>>>>>    * 28 readTrajectoryFile -- Reads a text file which contains a
>>>>>> time-tagged trajectory.
>>>>>>
>>>>>>    * 24 readNumTab --  Reads numeric values from another allocated
>>>>>> function-table and rescales them.
>>>>>>
>>>>>>    * 21 dist, uniDist, linDist, triDist, expDist, biexpDist,
>>>>>> gaussDist,
>>>>>> cauchyDist, pcauchyDist, betaDist, weibullDist, poissonDist --
>>>>>> Generates
>>>>>> tables of different random distributions.
>>>>>>
>>>>>>    * 18 tabseg -- Writes composite waveforms made up of pre-existing
>>>>>> waveforms.
>>>>>>
>>>>>>    * 31 mixOnTab -- Mixes any waveform specified in an existing table.
>>>>>>
>>>>>>    * 32 mixTabs -- Mixes any waveform, resampled with either FFT or
>>>>>> linear
>>>>>> interpolation.
>>>>>>
>>>>>>    * 30 tabHarmonics -- Generates harmonic partials by analyzing an
>>>>>> existing table.
>>>>>>
>>>>>> See the Csound docs for details of what table they produce.
>>>>>> Also the signatures for windows creating tabs was updated. It became
>>>>>> more
>>>>>> specific.
>>>>>>
>>>>>> Global arguments defined with Macros. We can create a Csound .csd file
>>>>>> in
>>>>>> our program
>>>>>> and after that we can run it on anything which has Csound installed.
>>>>>> It’s
>>>>>> desirable to be able
>>>>>> to tweak some parameters after rendering or to have some global config
>>>>>> arguments.
>>>>>> In Csound we can do it with macroses. We can use macros name in the
>>>>>> code
>>>>>> adn then we can change the value of the
>>>>>> macros with command line flag --omacro:Name=Value.
>>>>>>
>>>>>>  From now on it’s possible to do it with Haskell too. There are
>>>>>> functions:
>>>>>>
>>>>>>    readMacrosDouble  :: String -> Double -> D
>>>>>>    readMacrosInt     :: String -> Int -> D
>>>>>>    readMacrosString  :: String -> String -> Str
>>>>>>
>>>>>> The first argument is a macro name and the second one is the default
>>>>>> value
>>>>>> which is used if no value is set in the flags.
>>>>>>
>>>>>> The useful function to trigger an table based envelope. It comes in
>>>>>> two
>>>>>> flavors. One is driven with event stream
>>>>>> and another with just a signal. It’s on when signal is non zero.
>>>>>>
>>>>>>   trigTab :: Tab -> Sig -> Sig -> Sig
>>>>>>   trigTab tab duration triggerSignal
>>>>>>
>>>>>>   type Tick = Evt Unit
>>>>>>
>>>>>>   trigTabEvt :: Tab -> Sig -> Tick -> Sig
>>>>>>   trigTabEvt tab duration triggerSignal
>>>>>>
>>>>>> New functions for UI widgets.
>>>>>>
>>>>>> We can change the relative size of the window. If the widget is too
>>>>>> large
>>>>>> or too small
>>>>>> we can rescale it with functions:
>>>>>>
>>>>>>    type ScaleFactor = (Double, Double)
>>>>>>
>>>>>>    resizeGui :: ScaleFactor -> Gui -> Gui
>>>>>>
>>>>>>    resizeSource :: ScaleFactor -> Source a -> Source a
>>>>>>
>>>>>> They change the default minimal sizes for all widgets that are
>>>>>> contained
>>>>>> within the given widget.
>>>>>>
>>>>>> Grid layout. We are familiar with functions ver and hor. With them we
>>>>>> can
>>>>>> place the widgets vertically or horizontally.
>>>>>> But now it’s also possible to place the widgets on the grid:
>>>>>>
>>>>>>   grid :: Int -> [Gui] -> Gui
>>>>>>
>>>>>> The first argument specifies the number of elements in each row.
>>>>>>
>>>>>> There are handy grid functions for combining source-widgets:
>>>>>>
>>>>>>   gridLifts :: Int -> ([a] -> b) -> [Source a] -> Source b
>>>>>>
>>>>>> It applies a list based function to a list of value producer widgets
>>>>>> and
>>>>>> places all widgets on the grid.
>>>>>> The first argument is the same as with grid.
>>>>>>
>>>>>> UI default sizes are a bit smaller now.
>>>>>>
>>>>>> It compiles on GHC-7.8 again
>>>>>>
>>>>>> New function whileRef for imperative while loops.
>>>>>>
>>>>>>    whileRef :: Tuple st => st -> (st -> SE BoolSig) -> (st -> SE st)
>>>>>> -> SE
>>>>>> ()
>>>>>>    whileRef initState condition body
>>>>>>
>>>>>> It’s used in this way. It stores the initial state in the reference
>>>>>> (local variable)
>>>>>> and the it starts to implement the body while the predicate returns
>>>>>> true.
>>>>>> Notice that
>>>>>> the body is also updates the state.
>>>>>>
>>>>>> New functions for OSC that make it easy to read OSC messages that are
>>>>>> interpreted like signals.
>>>>>> For example we have an OSC-routine for volume control. When message
>>>>>> happens we update the value.
>>>>>> It would be good to be able to just read the signal:
>>>>>>
>>>>>>    listenOscVal :: (Tuple a, OscVal a) => OscRef -> String -> a -> SE
>>>>>> a
>>>>>>    listenOscVal oscRef address initValue
>>>>>>
>>>>>> There are two useful aliases for this function. They read signals and
>>>>>> pairs of signals:
>>>>>>
>>>>>>    listenOscSig  :: OscRef -> String -> Sig  -> SE Sig
>>>>>>    listenOscSig2 :: OscRef -> String -> Sig2 -> SE Sig2
>>>>>>
>>>>>> Adds loopers that preserve attacks when rescaling by tempo.
>>>>>> They are based on temposcal Csound algorithm.
>>>>>> The previous loopers were based on the mincer algorithm. It uses FFT
>>>>>> under the hood which can smooth out the sharp attacks.
>>>>>> It’s undesirable for percussive loops. The temposcal adds the feature
>>>>>> of
>>>>>> preserving attacks.
>>>>>>
>>>>>> See the functions:
>>>>>>
>>>>>>   -- | reads stereo files with scaling
>>>>>>   scaleWav ::  Fidelity -> TempoSig -> PitchSig -> String -> Sig2
>>>>>>
>>>>>>   -- | reads mono files with scaling
>>>>>>   scaleWav1 :: Fidelity -> TempoSig -> PitchSig -> String -> Sig
>>>>>>
>>>>>> Also there are presets for scaling the drums or harmonic instruments
>>>>>> (they set the appropriate fidelity):
>>>>>>
>>>>>>   scaleDrum, scaleHarm :: TempoSig -> PitchSig -> String -> Sig2
>>>>>>
>>>>>> The fidelity is the degree of the size of FFT window. The formula for
>>>>>> window size: 2 ** (fidelity + 11).
>>>>>>
>>>>>> Also the corresponding functions are added for csound-sampler.
>>>>>>
>>>>>>   wavScale :: Fidelity -> TempoSig -> PitchSig -> String -> Sam
>>>>>>   wavScale1 :: Fidelity -> TempoSig -> PitchSig -> String -> Sam
>>>>>>
>>>>>>   drumScale, harmScale :: TempoSig -> PitchSig -> String -> Sam
>>>>>>
>>>>>> The type signatures for echo and pingPong where simplified. Now they
>>>>>> don’t use side effects
>>>>>> and look like pure functions:
>>>>>>
>>>>>>    echo :: MaxDelayTime -> Feedback -> Sig -> Sig
>>>>>>    pingPong :: DelayTime -> Feedback -> Balance -> Sig2 -> Sig2
>>>>>>
>>>>>> Type signatures for functions randSkip and freqOf where generalized.
>>>>>> Now
>>>>>> they use signals for probabilities
>>>>>> instead of constant numbers. So we can change the probability of skip
>>>>>> of
>>>>>> the event during performance.
>>>>>>
>>>>>> New monophonic instruments are added in csound-catalog: fmBass1,
>>>>>> fmBass2,
>>>>>> dafunkLead and one polyphonic celloSynt.
>>>>>> Those instrument serve a good example for building monophonic
>>>>>> synthesizers with sharp attacks.
>>>>>>
>>>>>> Experimental features:
>>>>>>
>>>>>> Arrays, with all opcodes and functional traversals. See the guide for
>>>>>> details details.
>>>>>>
>>>>>> Imperative style instruments.
>>>>>>
>>>>>> With imperative style instruments we can create and invoke the
>>>>>> instruments in Csound way.
>>>>>> we can create an instrument and get it’s unique identifier. Than we
>>>>>> can
>>>>>> schedule a note by that identifier.
>>>>>>
>>>>>> We can create an instrument that produces a sound with function:
>>>>>>
>>>>>>    newOutInstr :: (Arg a, Sigs b) => (a -> SE b) -> SE (InstrRef a, b)
>>>>>>
>>>>>> It takes in a body of the instrument and gives back an instrument
>>>>>> reference and
>>>>>> a signal where the output is going to be written. Then we can invoke
>>>>>> the
>>>>>> notes just
>>>>>> like we do it in the Csound with function scheduleEvent:
>>>>>>
>>>>>>    scheduleEvent :: Arg a => InstrRef a -> D -> D -> a -> SE ()
>>>>>>    scheduleEvent instrRed delayStartTime duration arguments
>>>>>>
>>>>>> It takes in instrument reference, start time from the time of
>>>>>> invocation,
>>>>>> duration (all in seconds) and miscellaneous arguments.
>>>>>> Notice that the instrument reference is parametrized by the type of
>>>>>> arguments. This way we can not feed the wrong messages to the
>>>>>> instrument.
>>>>>>
>>>>>> Also we can create procedures that produce no output but do something
>>>>>> useful:
>>>>>>
>>>>>>    newInstr :: Arg a => (a -> SE ()) -> SE (InstrRef a)
>>>>>>
>>>>>> Happy Csounding!
>>>>>> Anton
>>>>>>
>>>>>> Links to the library:
>>>>>> https://hackage.haskell.org/package/csound-expression
>>>>>>
>>>>>> See the guide at github:
>>>>>> https://github.com/spell-music/csound-expression
>>>>>>
>>>>>> Csound mailing list Csound@listserv.heanet.ie
>>>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
>>>>>> https://github.com/csound/csound/issues Discussions of bugs and
>>>>>> features can
>>>>>> be posted here
>>>>>
>>>>> Csound mailing list Csound@listserv.heanet.ie
>>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
>>>>> https://github.com/csound/csound/issues Discussions of bugs and
>>>>> features can
>>>>> be posted here
>>>>
>>>>
>>>> Csound mailing list Csound@listserv.heanet.ie
>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
>>>> https://github.com/csound/csound/issues Discussions of bugs and features
>>>> can
>>>> be posted here
>>>
>>> Csound mailing list
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>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>> Send bugs reports to
>>>          https://github.com/csound/csound/issues
>>> Discussions of bugs and features can be posted here
>>>
>>
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>        https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
>
>
> Csound mailing list Csound@listserv.heanet.ie
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> https://github.com/csound/csound/issues Discussions of bugs and features can
> be posted here

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