This is the first time I've _ever_ been disappointed with Csound -- so I'd
love to read an explanation from a DSP expert on exactly why varying the
delay time introduces prominent new partials.

The code to reproduce the issue is given at the end of this message.

With this code, it's clear that there is a very slight improvement when
deltapi is used, as opposed to deltap. The sidebands with deltap are a bit
louder. So maybe the problem is not, after all, due to a bug in deltapi.

Maybe this really is the best that can be expected when the delay time is
varied -- at least, with an audio system that uses a constant-rate clock.
(I'm guessing that using a hardware delay device with a variable clock rate
might solve the problem.) Or maybe there are more recent developments in
DSP-land that can ameliorate the effect, but those developments haven't been
incorporated into the deltap/deltapi code.

I'm very curious about this. Can anyone offer observations? Thanks in
advance!

--Jim Aikin

P.S.: Note that I've set sr to 96000 and ksmps to 1 in order to remove a
couple of possible sources of signal degradation.

[code]






sr = 96000
ksmps = 1
nchnls = 2
0dbfs = 1

giSine	ftgen	0, 0, 8192, 10, 1
giCos	ftgen	0, 0, 8192, 11, 1

instr 1

iamp = 0.5
ifreq = 300
; generate a constant-frequency sine wave:
asig	oscil	iamp, ifreq, giSine

; delay the sound of the oscillator by a
; slowly swept time interval:
adel	init	0
adelt	oscil	0.5, 0.2, giSine
adelt	=		adelt + 1.5
; downsampling because deltap won't take
; an a-rate argument:
kdelt	downsamp	adelt
adummy	delayr	3
; switch opcode from the score:
if (p4 == 1) goto no_i
adel	deltapi	adelt
goto done
no_i:
adel	deltap	kdelt
done:
		delayw	asig

		outs	adel, adel

endin




; with deltapi:
i 1 0 10 0
; with deltap:
i 1 9 10 1






--
View this message in context: http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483.html
Sent from the Csound - General mailing list archive at Nabble.com.

Did Victor's response not help?

"You are using a truncating oscillator. Try changing the delay time
modulator by an oscili and the distortion will go away."

I tried using vdelay3 and got artifacts:

instr 1

iamp = 0.5
ifreq = 300
; generate a constant-frequency sine wave:
asig    oscil   iamp, ifreq, giSine

; delay the sound of the oscillator by a
; slowly swept time interval:
adel    init    0
adelt   oscil   0.5, 0.2, giSine
adelt   =               (adelt + 1.5) * 1000

adel vdelay3 asig, adelt, 4000

outs    adel, adel

endin

But I then ran the example for vdelay3
(http://csounds.com/manual/html/vdelay3.html) and it has no artifacts.
 Switching to poscil in your example + vdelay3:

instr 1

iamp = 0.5
ifreq = 300
; generate a constant-frequency sine wave:
asig    poscil   iamp, ifreq, giSine

; delay the sound of the oscillator by a
; slowly swept time interval:
adel    init    0
adelt   poscil   0.5, 0.2, giSine
adelt   =               (adelt + 1.5) * 1000

adel vdelay3 asig, adelt, 4000


outs    adel, adel

endin

produces no artifacts here.


On Mon, Dec 2, 2013 at 1:56 PM, Jim Aikin  wrote:
> This is the first time I've _ever_ been disappointed with Csound -- so I'd
> love to read an explanation from a DSP expert on exactly why varying the
> delay time introduces prominent new partials.
>
> The code to reproduce the issue is given at the end of this message.
>
> With this code, it's clear that there is a very slight improvement when
> deltapi is used, as opposed to deltap. The sidebands with deltap are a bit
> louder. So maybe the problem is not, after all, due to a bug in deltapi.
>
> Maybe this really is the best that can be expected when the delay time is
> varied -- at least, with an audio system that uses a constant-rate clock.
> (I'm guessing that using a hardware delay device with a variable clock rate
> might solve the problem.) Or maybe there are more recent developments in
> DSP-land that can ameliorate the effect, but those developments haven't been
> incorporated into the deltap/deltapi code.
>
> I'm very curious about this. Can anyone offer observations? Thanks in
> advance!
>
> --Jim Aikin
>
> P.S.: Note that I've set sr to 96000 and ksmps to 1 in order to remove a
> couple of possible sources of signal degradation.
>
> [code]
>
> 
> 
> 
> 
>
> sr = 96000
> ksmps = 1
> nchnls = 2
> 0dbfs = 1
>
> giSine  ftgen   0, 0, 8192, 10, 1
> giCos   ftgen   0, 0, 8192, 11, 1
>
> instr 1
>
> iamp = 0.5
> ifreq = 300
> ; generate a constant-frequency sine wave:
> asig    oscil   iamp, ifreq, giSine
>
> ; delay the sound of the oscillator by a
> ; slowly swept time interval:
> adel    init    0
> adelt   oscil   0.5, 0.2, giSine
> adelt   =               adelt + 1.5
> ; downsampling because deltap won't take
> ; an a-rate argument:
> kdelt   downsamp        adelt
> adummy  delayr  3
> ; switch opcode from the score:
> if (p4 == 1) goto no_i
> adel    deltapi adelt
> goto done
> no_i:
> adel    deltap  kdelt
> done:
>                 delayw  asig
>
>                 outs    adel, adel
>
> endin
>
> 
> 
>
> ; with deltapi:
> i 1 0 10 0
> ; with deltap:
> i 1 9 10 1
>
> 
> 
>
>
>
> --
> View this message in context: http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483.html
> Sent from the Csound - General mailing list archive at Nabble.com.
>
>
> Send bugs reports to the Sourceforge bug trackers
> csound6:
>             https://sourceforge.net/p/csound/tickets/
> csound5:
>             https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>

The problem with your first example was that you were using oscil instead of oscili. Did you not get my response?

On 2 Dec 2013, at 18:56, Jim Aikin wrote:

> This is the first time I've _ever_ been disappointed with Csound -- so I'd
> love to read an explanation from a DSP expert on exactly why varying the
> delay time introduces prominent new partials.
> 
> The code to reproduce the issue is given at the end of this message.
> 
> With this code, it's clear that there is a very slight improvement when
> deltapi is used, as opposed to deltap. The sidebands with deltap are a bit
> louder. So maybe the problem is not, after all, due to a bug in deltapi.
> 
> Maybe this really is the best that can be expected when the delay time is
> varied -- at least, with an audio system that uses a constant-rate clock.
> (I'm guessing that using a hardware delay device with a variable clock rate
> might solve the problem.) Or maybe there are more recent developments in
> DSP-land that can ameliorate the effect, but those developments haven't been
> incorporated into the deltap/deltapi code.
> 
> I'm very curious about this. Can anyone offer observations? Thanks in
> advance!
> 
> --Jim Aikin
> 
> P.S.: Note that I've set sr to 96000 and ksmps to 1 in order to remove a
> couple of possible sources of signal degradation.
> 
> [code]
> 
> 
> 
> 
> 
> 
> sr = 96000
> ksmps = 1
> nchnls = 2
> 0dbfs = 1
> 
> giSine	ftgen	0, 0, 8192, 10, 1
> giCos	ftgen	0, 0, 8192, 11, 1
> 
> instr 1
> 
> iamp = 0.5
> ifreq = 300
> ; generate a constant-frequency sine wave:
> asig	oscil	iamp, ifreq, giSine
> 
> ; delay the sound of the oscillator by a
> ; slowly swept time interval:
> adel	init	0
> adelt	oscil	0.5, 0.2, giSine
> adelt	=		adelt + 1.5
> ; downsampling because deltap won't take
> ; an a-rate argument:
> kdelt	downsamp	adelt
> adummy	delayr	3
> ; switch opcode from the score:
> if (p4 == 1) goto no_i
> adel	deltapi	adelt
> goto done
> no_i:
> adel	deltap	kdelt
> done:
> 		delayw	asig
> 
> 		outs	adel, adel
> 
> endin
> 
> 
> 
> 
> ; with deltapi:
> i 1 0 10 0
> ; with deltap:
> i 1 9 10 1
> 
> 
> 
> 
> 
> 
> --
> View this message in context: http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483.html
> Sent from the Csound - General mailing list archive at Nabble.com.
> 
> 
> Send bugs reports to the Sourceforge bug trackers
> csound6:
>            https://sourceforge.net/p/csound/tickets/
> csound5:
>            https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
> 
> 

Dr Victor Lazzarini
Senior Lecturer
Dept. of Music
NUI Maynooth Ireland
tel.: +353 1 708 3545
Victor dot Lazzarini AT nuim dot ie

Not according to the nabble page:
http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-td5730368.html#a5730382

On 2 December 2013 19:21, Victor Lazzarini  wrote:
> The problem with your first example was that you were using oscil instead of oscili. Did you not get my response?
>
> On 2 Dec 2013, at 18:56, Jim Aikin wrote:
>
>> This is the first time I've _ever_ been disappointed with Csound -- so I'd
>> love to read an explanation from a DSP expert on exactly why varying the
>> delay time introduces prominent new partials.
>>
>> The code to reproduce the issue is given at the end of this message.
>>
>> With this code, it's clear that there is a very slight improvement when
>> deltapi is used, as opposed to deltap. The sidebands with deltap are a bit
>> louder. So maybe the problem is not, after all, due to a bug in deltapi.
>>
>> Maybe this really is the best that can be expected when the delay time is
>> varied -- at least, with an audio system that uses a constant-rate clock.
>> (I'm guessing that using a hardware delay device with a variable clock rate
>> might solve the problem.) Or maybe there are more recent developments in
>> DSP-land that can ameliorate the effect, but those developments haven't been
>> incorporated into the deltap/deltapi code.
>>
>> I'm very curious about this. Can anyone offer observations? Thanks in
>> advance!
>>
>> --Jim Aikin
>>
>> P.S.: Note that I've set sr to 96000 and ksmps to 1 in order to remove a
>> couple of possible sources of signal degradation.
>>
>> [code]
>>
>> 
>> 
>> 
>> 
>>
>> sr = 96000
>> ksmps = 1
>> nchnls = 2
>> 0dbfs = 1
>>
>> giSine        ftgen   0, 0, 8192, 10, 1
>> giCos ftgen   0, 0, 8192, 11, 1
>>
>> instr 1
>>
>> iamp = 0.5
>> ifreq = 300
>> ; generate a constant-frequency sine wave:
>> asig  oscil   iamp, ifreq, giSine
>>
>> ; delay the sound of the oscillator by a
>> ; slowly swept time interval:
>> adel  init    0
>> adelt oscil   0.5, 0.2, giSine
>> adelt =               adelt + 1.5
>> ; downsampling because deltap won't take
>> ; an a-rate argument:
>> kdelt downsamp        adelt
>> adummy        delayr  3
>> ; switch opcode from the score:
>> if (p4 == 1) goto no_i
>> adel  deltapi adelt
>> goto done
>> no_i:
>> adel  deltap  kdelt
>> done:
>>               delayw  asig
>>
>>               outs    adel, adel
>>
>> endin
>>
>> 
>> 
>>
>> ; with deltapi:
>> i 1 0 10 0
>> ; with deltap:
>> i 1 9 10 1
>>
>> 
>> 
>>
>>
>>
>> --
>> View this message in context: http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483.html
>> Sent from the Csound - General mailing list archive at Nabble.com.
>>
>>
>> Send bugs reports to the Sourceforge bug trackers
>> csound6:
>>            https://sourceforge.net/p/csound/tickets/
>> csound5:
>>            https://sourceforge.net/p/csound/bugs/
>> Discussions of bugs and features can be posted here
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>>
>>
>
> Dr Victor Lazzarini
> Senior Lecturer
> Dept. of Music
> NUI Maynooth Ireland
> tel.: +353 1 708 3545
> Victor dot Lazzarini AT nuim dot ie
>
>
>
>
>
> Send bugs reports to the Sourceforge bug trackers
> csound6:
>             https://sourceforge.net/p/csound/tickets/
> csound5:
>             https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>

> The problem with your first example was that you were using oscil instead
of oscili.
> Did you not get my response? 

Never received it, no. I don't read the digest email from the Csound mailing
list ... in fact, my ISP screens it out, and I don't care, because it's
impossible to sort through. (Way, way too much quoting of previous material,
for one thing!) I rely entirely on the pseudo-forum interface on Nabble, and
your response never appeared in that other thread.



--
View this message in context: http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483p5730503.html
Sent from the Csound - General mailing list archive at Nabble.com.

yes, the reply went somewhere else. Anyway, if your delaytime modulator signal comes from
an interpolating oscillator, then the distortion disappears.

On 2 Dec 2013, at 21:58, Jim Aikin wrote:

>> The problem with your first example was that you were using oscil instead
> of oscili.
>> Did you not get my response? 
> 
> Never received it, no. I don't read the digest email from the Csound mailing
> list ... in fact, my ISP screens it out, and I don't care, because it's
> impossible to sort through. (Way, way too much quoting of previous material,
> for one thing!) I rely entirely on the pseudo-forum interface on Nabble, and
> your response never appeared in that other thread.
> 
> 
> 
> --
> View this message in context: http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483p5730503.html
> Sent from the Csound - General mailing list archive at Nabble.com.
> 
> 
> Send bugs reports to the Sourceforge bug trackers
> csound6:
>            https://sourceforge.net/p/csound/tickets/
> csound5:
>            https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
> 
> 

Dr Victor Lazzarini
Senior Lecturer
Dept. of Music
NUI Maynooth Ireland
tel.: +353 1 708 3545
Victor dot Lazzarini AT nuim dot ie

> Anyway, if your delaytime modulator signal comes from
> an interpolating oscillator, then the distortion disappears. 

Indeed it does. Thanks for explaining this! There's always more for me to
learn in Csound.

I had gotten out of the habit of using oscili because, modern computers
having so much memory, it's easy to use a large wavetable, which reduces the
need for interpolation if the oscillator is intended for audio output. But
also, modern CPUs are fast enough that there's little reason _not_ to use
interpolation.

This .csd was a mock-up to make sure I knew what I was doing before I tried
modulating delay time from a MIDI slider. I know to use portk on the
slider's data, but ... I guess I'll find out whether I get a similar
artifact. If so, ksmps=1 may help.



--
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Sent from the Csound - General mailing list archive at Nabble.com.

Just my 2 cents,
setting ksmps=1 will not do much in this case, it is only relevant if
you're using feedback in the delay line and even so, for longer delay
times the difference will be insignificant in most cases.
But I think it will work fine controlled from a midi slider in any
case, when you filter the control signal so it's real smooth.
If you need an even smoother delay line interpolation, you can try
vdelayx, which has a-rate delay time modulation and high enough
precision in the interpolation to allow very fast changes in delay
time without clicks (chorus, flanger, FM...)
all best
Oeyvind

2013/12/3 Jim Aikin :
>> Anyway, if your delaytime modulator signal comes from
>> an interpolating oscillator, then the distortion disappears.
>
> Indeed it does. Thanks for explaining this! There's always more for me to
> learn in Csound.
>
> I had gotten out of the habit of using oscili because, modern computers
> having so much memory, it's easy to use a large wavetable, which reduces the
> need for interpolation if the oscillator is intended for audio output. But
> also, modern CPUs are fast enough that there's little reason _not_ to use
> interpolation.
>
> This .csd was a mock-up to make sure I knew what I was doing before I tried
> modulating delay time from a MIDI slider. I know to use portk on the
> slider's data, but ... I guess I'll find out whether I get a similar
> artifact. If so, ksmps=1 may help.
>
>
>
> --
> View this message in context: http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483p5730507.html
> Sent from the Csound - General mailing list archive at Nabble.com.
>
>
> Send bugs reports to the Sourceforge bug trackers
> csound6:
>             https://sourceforge.net/p/csound/tickets/
> csound5:
>             https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>



-- 

Oeyvind Brandtsegg
Professor of Music Technology
NTNU
7491 Trondheim
Norway
Cell: +47 92 203 205

http://flyndresang.no/
http://www.partikkelaudio.com/
http://soundcloud.com/brandtsegg
http://soundcloud.com/t-emp

these experiences are the reason that if anyone in the floss manual uses 
oscil, i hack the code and change it to poscil. please be on my side in 
the future ... =)
	joachim


Am 03.12.2013 01:58, schrieb Jim Aikin:
>> Anyway, if your delaytime modulator signal comes from
>> an interpolating oscillator, then the distortion disappears.
>
> Indeed it does. Thanks for explaining this! There's always more for me to
> learn in Csound.
>
> I had gotten out of the habit of using oscili because, modern computers
> having so much memory, it's easy to use a large wavetable, which reduces the
> need for interpolation if the oscillator is intended for audio output. But
> also, modern CPUs are fast enough that there's little reason _not_ to use
> interpolation.
>
> This .csd was a mock-up to make sure I knew what I was doing before I tried
> modulating delay time from a MIDI slider. I know to use portk on the
> slider's data, but ... I guess I'll find out whether I get a similar
> artifact. If so, ksmps=1 may help.
>
>
>
> --
> View this message in context: http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483p5730507.html
> Sent from the Csound - General mailing list archive at Nabble.com.
>
>
> Send bugs reports to the Sourceforge bug trackers
> csound6:
>              https://sourceforge.net/p/csound/tickets/
> csound5:
>              https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>
>

oscil was my first love.

On 4 December 2013 21:45, joachim heintz  wrote:
> these experiences are the reason that if anyone in the floss manual uses
> oscil, i hack the code and change it to poscil. please be on my side in the
> future ... =)
>         joachim
>
>
> Am 03.12.2013 01:58, schrieb Jim Aikin:
>>>
>>> Anyway, if your delaytime modulator signal comes from
>>> an interpolating oscillator, then the distortion disappears.
>>
>>
>> Indeed it does. Thanks for explaining this! There's always more for me to
>> learn in Csound.
>>
>> I had gotten out of the habit of using oscili because, modern computers
>> having so much memory, it's easy to use a large wavetable, which reduces
>> the
>> need for interpolation if the oscillator is intended for audio output. But
>> also, modern CPUs are fast enough that there's little reason _not_ to use
>> interpolation.
>>
>> This .csd was a mock-up to make sure I knew what I was doing before I
>> tried
>> modulating delay time from a MIDI slider. I know to use portk on the
>> slider's data, but ... I guess I'll find out whether I get a similar
>> artifact. If so, ksmps=1 may help.
>>
>>
>>
>> --
>> View this message in context:
>> http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483p5730507.html
>> Sent from the Csound - General mailing list archive at Nabble.com.
>>
>>
>> Send bugs reports to the Sourceforge bug trackers
>> csound6:
>>              https://sourceforge.net/p/csound/tickets/
>> csound5:
>>              https://sourceforge.net/p/csound/bugs/
>> 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 trackers
> csound6:
>            https://sourceforge.net/p/csound/tickets/
> csound5:
>            https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
> csound"
>
>

=)

Am 04.12.2013 23:33, schrieb Rory Walsh:
> oscil was my first love.
>
> On 4 December 2013 21:45, joachim heintz  wrote:
>> these experiences are the reason that if anyone in the floss manual uses
>> oscil, i hack the code and change it to poscil. please be on my side in the
>> future ... =)
>>          joachim
>>
>>
>> Am 03.12.2013 01:58, schrieb Jim Aikin:
>>>>
>>>> Anyway, if your delaytime modulator signal comes from
>>>> an interpolating oscillator, then the distortion disappears.
>>>
>>>
>>> Indeed it does. Thanks for explaining this! There's always more for me to
>>> learn in Csound.
>>>
>>> I had gotten out of the habit of using oscili because, modern computers
>>> having so much memory, it's easy to use a large wavetable, which reduces
>>> the
>>> need for interpolation if the oscillator is intended for audio output. But
>>> also, modern CPUs are fast enough that there's little reason _not_ to use
>>> interpolation.
>>>
>>> This .csd was a mock-up to make sure I knew what I was doing before I
>>> tried
>>> modulating delay time from a MIDI slider. I know to use portk on the
>>> slider's data, but ... I guess I'll find out whether I get a similar
>>> artifact. If so, ksmps=1 may help.
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>> http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483p5730507.html
>>> Sent from the Csound - General mailing list archive at Nabble.com.
>>>
>>>
>>> Send bugs reports to the Sourceforge bug trackers
>>> csound6:
>>>               https://sourceforge.net/p/csound/tickets/
>>> csound5:
>>>               https://sourceforge.net/p/csound/bugs/
>>> 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 trackers
>> csound6:
>>             https://sourceforge.net/p/csound/tickets/
>> csound5:
>>             https://sourceforge.net/p/csound/bugs/
>> 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 trackers
> csound6:
>              https://sourceforge.net/p/csound/tickets/
> csound5:
>              https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>
>
>

+1, Rory. oscil may be out of its mind, but it still has its uses. =)

On 12/5/13, joachim heintz  wrote:
> =)
>
> Am 04.12.2013 23:33, schrieb Rory Walsh:
>> oscil was my first love.
>>
>> On 4 December 2013 21:45, joachim heintz  wrote:
>>> these experiences are the reason that if anyone in the floss manual uses
>>> oscil, i hack the code and change it to poscil. please be on my side in
>>> the
>>> future ... =)
>>>          joachim
>>>
>>>
>>> Am 03.12.2013 01:58, schrieb Jim Aikin:
>>>>>
>>>>> Anyway, if your delaytime modulator signal comes from
>>>>> an interpolating oscillator, then the distortion disappears.
>>>>
>>>>
>>>> Indeed it does. Thanks for explaining this! There's always more for me
>>>> to
>>>> learn in Csound.
>>>>
>>>> I had gotten out of the habit of using oscili because, modern computers
>>>> having so much memory, it's easy to use a large wavetable, which
>>>> reduces
>>>> the
>>>> need for interpolation if the oscillator is intended for audio output.
>>>> But
>>>> also, modern CPUs are fast enough that there's little reason _not_ to
>>>> use
>>>> interpolation.
>>>>
>>>> This .csd was a mock-up to make sure I knew what I was doing before I
>>>> tried
>>>> modulating delay time from a MIDI slider. I know to use portk on the
>>>> slider's data, but ... I guess I'll find out whether I get a similar
>>>> artifact. If so, ksmps=1 may help.
>>>>
>>>>
>>>>
>>>> --
>>>> View this message in context:
>>>> http://csound.1045644.n5.nabble.com/Distortion-with-deltapi-follow-up-tp5730483p5730507.html
>>>> Sent from the Csound - General mailing list archive at Nabble.com.
>>>>
>>>>
>>>> Send bugs reports to the Sourceforge bug trackers
>>>> csound6:
>>>>               https://sourceforge.net/p/csound/tickets/
>>>> csound5:
>>>>               https://sourceforge.net/p/csound/bugs/
>>>> 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 trackers
>>> csound6:
>>>             https://sourceforge.net/p/csound/tickets/
>>> csound5:
>>>             https://sourceforge.net/p/csound/bugs/
>>> 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 trackers
>> csound6:
>>              https://sourceforge.net/p/csound/tickets/
>> csound5:
>>              https://sourceforge.net/p/csound/bugs/
>> 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 trackers
> csound6:
>             https://sourceforge.net/p/csound/tickets/
> csound5:
>             https://sourceforge.net/p/csound/bugs/
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
> csound"
>
>
>