hi rené -

what you want to do should be easy to do in csound. here are some
comments to your questions:

1)
> To rearrange the ARP table I will have to make some functions like:
> * Find an element in a table
> * Find the minimum value in a table
> * shift to Left the elements of a table
> * Reorder in ascending order (for UP/DOWN mode) a table
>
> If I am not wrong there is no opcode for above functions.

i have something like this in my udo collection. see the TabSort_i.csd
in the attachment which is with an example. it's at i-rate. but either
it might help for your own udo formulation, or you can use it at i-rate
because you trigger a subinstrument for this task (which then does the
job at i-rate and turns itself off).

2)
> My doubts are:
>
> midiin opcode is krate, if I make these rearrange functions in UDO, I
> will need many krate loop to get the result, so I am afraid to face some
> synchronizing problems.

i don't think you need many k-rate loops to get the result. why do you
believe it could happen?

hope this helps. let us know about any problems. all best -

	joachim


Am 02.07.2011 19:31, schrieb Rene Jopi:
> Hi list,
> 
> I would like to have some help to avoid to go to wrong choices.
> First, before re inventing the wheel, does anyone already made a real
> time midi analogue style arpeggiator with Csound?
> I have not found any with Csound, found some made with MaxMSP and PD,
> but I prefer Csound !
> 
> I would like to make an emulation of the arpeggiator (ARP) of the
> Sequential Circuit 6 Trak synthesizer. 
> It works as follow:
> 
> If one key is down, the ARP is not triggered. The note is played as
> normal to the audio synth.
> 
> If more than one key are down, the ARP plays the notes in sequence with
> adjustable speed.
> There is two "reading" modes:
> 
> * UP/DOWN mode: Plays the pressed keys from lowest to
> highest note and highest to lowest note.
> * ASSIGN mode: Plays the pressed keys at the order they have been pressed. 
> 
> 
> What I plan to do is:
> 
> * Use midiin opcode
> * Store midi on note to an ARP table
> * Remove note from ARP table when a midi note off is received
> * Rearrange the ARP table
> * Read the ARP table and send notes to the audio engine
> 
> To rearrange the ARP table I will have to make some functions like:
> * Find an element in a table
> * Find the minimum value in a table
> * shift to Left the elements of a table
> * Reorder in ascending order (for UP/DOWN mode) a table
> 
> If I am not wrong there is no opcode for above functions.
> 
> My doubts are:
> 
> midiin opcode is krate, if I make these rearrange functions in UDO, I
> will need many krate loop to get the result, so I am afraid to face some
> synchronizing problems.
> 
> Using Python opcodes is possible? If within Csound, I call a Python
> script including a loop, at what speed this loop is performed? At the
> Python speed or Csound krate?
> How to pass a Csound table to the Python opcode and to receive the
> rearranged table in return?
> 
> Voila, thanks in advance for any replies, thanks anyway for reading my
> poor English :)
> 
> Cheers,
> René
> 

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hi renè -

i am glad you found my material helpful. both loops (i- or k-rate) are
possible. i-time loop is not faster; you are just sure it happens at the
start (initialization) of an instrument, and just once. the main
difference is that a k-loop would be repeated at every k-pass if you do
not avoid it by something like "just go into this loop if ...".

i tried to explain this in
http://en.flossmanuals.net/csound/ch016_a-initialization-and-performance-pass.
let me know any suggestions to make this better.

best -

	joachim



Am 04.07.2011 13:13, schrieb Rene Jopi:
> Hi,
> 
> Thanks for your replies and examples, I was sure to get good help :) 
> 
> Now, I understand that my comment <<... will need many krate loop to get
> the result...>> is stupid,
> an itime loop is faster than a ktime loop!
> 
> Cheers,
> René
> 
> 
> 
> 
> 
> 
> 
> 
> 2011/7/3 joachim heintz >
> 
>     hi rené -
> 
>     what you want to do should be easy to do in csound. here are some
>     comments to your questions:
> 
>     1)
>     > To rearrange the ARP table I will have to make some functions like:
>     > * Find an element in a table
>     > * Find the minimum value in a table
>     > * shift to Left the elements of a table
>     > * Reorder in ascending order (for UP/DOWN mode) a table
>     >
>     > If I am not wrong there is no opcode for above functions.
> 
>     i have something like this in my udo collection. see the TabSort_i.csd
>     in the attachment which is with an example. it's at i-rate. but either
>     it might help for your own udo formulation, or you can use it at i-rate
>     because you trigger a subinstrument for this task (which then does the
>     job at i-rate and turns itself off).
> 
>     2)
>     > My doubts are:
>     >
>     > midiin opcode is krate, if I make these rearrange functions in UDO, I
>     > will need many krate loop to get the result, so I am afraid to
>     face some
>     > synchronizing problems.
> 
>     i don't think you need many k-rate loops to get the result. why do you
>     believe it could happen?
> 
>     hope this helps. let us know about any problems. all best -
> 
>            joachim
> 
> 
>     Am 02.07.2011 19:31, schrieb Rene Jopi:
>     > Hi list,
>     >
>     > I would like to have some help to avoid to go to wrong choices.
>     > First, before re inventing the wheel, does anyone already made a real
>     > time midi analogue style arpeggiator with Csound?
>     > I have not found any with Csound, found some made with MaxMSP and PD,
>     > but I prefer Csound !
>     >
>     > I would like to make an emulation of the arpeggiator (ARP) of the
>     > Sequential Circuit 6 Trak synthesizer.
>     > It works as follow:
>     >
>     > If one key is down, the ARP is not triggered. The note is played as
>     > normal to the audio synth.
>     >
>     > If more than one key are down, the ARP plays the notes in sequence
>     with
>     > adjustable speed.
>     > There is two "reading" modes:
>     >
>     > * UP/DOWN mode: Plays the pressed keys from lowest to
>     > highest note and highest to lowest note.
>     > * ASSIGN mode: Plays the pressed keys at the order they have been
>     pressed.
>     >
>     >
>     > What I plan to do is:
>     >
>     > * Use midiin opcode
>     > * Store midi on note to an ARP table
>     > * Remove note from ARP table when a midi note off is received
>     > * Rearrange the ARP table
>     > * Read the ARP table and send notes to the audio engine
>     >
>     > To rearrange the ARP table I will have to make some functions like:
>     > * Find an element in a table
>     > * Find the minimum value in a table
>     > * shift to Left the elements of a table
>     > * Reorder in ascending order (for UP/DOWN mode) a table
>     >
>     > If I am not wrong there is no opcode for above functions.
>     >
>     > My doubts are:
>     >
>     > midiin opcode is krate, if I make these rearrange functions in UDO, I
>     > will need many krate loop to get the result, so I am afraid to
>     face some
>     > synchronizing problems.
>     >
>     > Using Python opcodes is possible? If within Csound, I call a Python
>     > script including a loop, at what speed this loop is performed? At the
>     > Python speed or Csound krate?
>     > How to pass a Csound table to the Python opcode and to receive the
>     > rearranged table in return?
>     >
>     > Voila, thanks in advance for any replies, thanks anyway for reading my
>     > poor English :)
>     >
>     > Cheers,
>     > René
>     >
> 
>     Send bugs reports to the Sourceforge bug tracker
>              
>      https://sourceforge.net/tracker/?group_id=81968&atid=564599
>     
>     Discussions of bugs and features can be posted here
>     To unsubscribe, send email sympa@lists.bath.ac.uk
>      with body "unsubscribe csound"
> 
> 


Send bugs reports to the Sourceforge bug tracker
            https://sourceforge.net/tracker/?group_id=81968&atid=564599
Discussions of bugs and features can be posted here
To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"