Re: [Csnd-dev] [EXTERNAL] [Csnd-dev] More Daisy help

Ah yes, sorry. I tried both the processing example and generative example
and they worked on the Versio.

On Sun, Sep 14, 2025 at 2:43 PM Victor Lazzarini <
[email protected]> wrote:

> What I was asking is whether the Daisy Csound processing example works in
> your system. If it doesn't then there is something else needed there. The
> example was tested and ran ok in the Daisy Pod.
>
> Prof. Victor Lazzarini
> Maynooth University
> Ireland
>
> On 14 Sep 2025, at 19:29, Dave Seidel <[email protected]> wrote:
>
> 
> Yes, the book example works fine on my RPi. On  the Versio/Daisy it is
> noisy, similar to the result I got from my original code. This is why I am
> now thinking that possibly something needs to change in the C code to work
> properly on this particular Daisy platform. So I will study the published
> Versio example (which is entirely C) and see if I can spot the
> difference(s). We may need different boilerplate code for Csound on Versio.
>
> On Sun, Sep 14, 2025 at 2:22 PM Victor Lazzarini <
> [email protected]> wrote:
>
>> and the Csound processing example, how does that do in your setup? Does
>> it work well.
>>
>> The delay line shifter code is fairly low in cost, so I would think it
>> should run well. It should even allow for small ksmps/blocksize. I had a
>> variable delay code running here with ksmps=8, and audio block size set to
>> ksmps.
>>
>> Prof. Victor Lazzarini
>> Maynooth University
>> Ireland
>>
>> On 14 Sep 2025, at 19:07, Dave Seidel <[email protected]> wrote:
>>
>> 
>> Identical to DaisyCsoundProcess, the only difference being the name of
>> the file and the name of the included header.
>>
>> On Sun, Sep 14, 2025 at 1:25 PM Victor Lazzarini <
>> [email protected]> wrote:
>>
>>> And the C program you used?
>>> Prof. Victor Lazzarini
>>> Maynooth University
>>> Ireland
>>>
>>> On 14 Sep 2025, at 18:18, Dave Seidel <[email protected]> wrote:
>>>
>>> 
>>> Still haven't found my book, but I do have a (purchased) PDF of the
>>> Springer Csound book by Victor et al. This contains the same pitchshifter
>>> code along with the explanation.
>>>
>>> (BTW, the window used in the book is a triangle. Any reason to prefer
>>> Hanningh over triangle?)
>>>
>>> In any case, this pitchy shifter code doesn't work well on my Daisy
>>> either -- still a lot of noise overlaying the generated output. But this is
>>> a Versio, so perhaps it requires something different in the
>>> setup/initialization? Next step, I guess, is to compare the code in the
>>> Versio example in DaisyExamples to the boilerplate C++ code used in the
>>> DaisyCsound examples.
>>>
>>> I've attached my header file with the Csound code in it. The same Csound
>>> code works just fine on my Raspberry Pi.
>>>
>>>
>>> On Fri, Sep 12, 2025 at 4:19 PM Victor Lazzarini <
>>> [email protected]> wrote:
>>>
>>>> I think the second pvsynth in this code might be pushing it
>>>> Prof. Victor Lazzarini
>>>> Maynooth University
>>>> Ireland
>>>>
>>>> On 12 Sep 2025, at 20:18, Dave Seidel <[email protected]> wrote:
>>>>
>>>> 
>>>> Rory, this was running in Daisy?
>>>>
>>>> On Fri, Sep 12, 2025 at 3:13 PM Rory Walsh <[email protected]> wrote:
>>>>
>>>>> I've used ksmps=256 and fftsize=1024 and it's worked Ok for me. I've
>>>>> been using pvsmooth and pvsynth. Not very heavy stuff, but nice results all
>>>>> the same.
>>>>>
>>>>> On Fri, 12 Sept 2025 at 20:11, Dave Seidel <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> Great, thanks very much! Still looking for the book... :-)
>>>>>>
>>>>>> On Fri, Sep 12, 2025 at 1:56 PM Victor Lazzarini <
>>>>>> [email protected]> wrote:
>>>>>>
>>>>>>> Essentially this
>>>>>>> https://github.com/csound/book/blob/master/part4/chapter13/13.12.csd
>>>>>>>
>>>>>>> Prof. Victor Lazzarini
>>>>>>> Maynooth University
>>>>>>> Ireland
>>>>>>>
>>>>>>> On 12 Sep 2025, at 18:41, Dave Seidel <[email protected]> wrote:
>>>>>>>
>>>>>>> 
>>>>>>> Thanks, Victor. I'll try those things, though I already tried
>>>>>>> ksmps=256 and FFT size 1024 -- didn't work, but it did reduce the noise
>>>>>>> somewhat, so I think that reinforces your theory.
>>>>>>>
>>>>>>> The delay-based approach might be fine, thanks for the suggestion. I
>>>>>>> know I have the book around somewhere, I just need to find it....
>>>>>>>
>>>>>>> On Fri, Sep 12, 2025 at 1:17 PM Victor Lazzarini <
>>>>>>> [email protected]> wrote:
>>>>>>>
>>>>>>>> Hi Dave,
>>>>>>>>
>>>>>>>> this is probably because the Daisy can't compute audio in time for
>>>>>>>> the interrupt.
>>>>>>>> It could be that the FFTs are too much for it.
>>>>>>>> There's a few things you could try:
>>>>>>>>
>>>>>>>> increase ksmps to 256
>>>>>>>> decrease FFT size to 1024
>>>>>>>>
>>>>>>>> keep ksmps at 128
>>>>>>>> decrease FFT size to 512
>>>>>>>>
>>>>>>>> I have not yet tested spectral processing to see what the limits
>>>>>>>> are. I can't do any testing at the moment because my Daisy seed is faulty,
>>>>>>>> I'm waiting on a replacement.
>>>>>>>>
>>>>>>>> An alternative to doing pvs-based pitch shifting is to use a delay
>>>>>>>> line pitch shifter, which might just work ok in your case. Russell
>>>>>>>> Pinkston's chapter in the Csound Book has an example you could use.
>>>>>>>>
>>>>>>>> Otherwise I can send you some code.
>>>>>>>>
>>>>>>>> best
>>>>>>>> Prof. Victor Lazzarini
>>>>>>>> Maynooth University
>>>>>>>> Ireland
>>>>>>>>
>>>>>>>> On 12 Sep 2025, at 16:38, Dave Seidel <[email protected]>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>> 
>>>>>>>> *Warning*
>>>>>>>>
>>>>>>>> This email originated from outside of Maynooth University's Mail
>>>>>>>> System. Do not reply, click links or open attachments unless you recognise
>>>>>>>> the sender and know the content is safe.
>>>>>>>> Hi Victor,
>>>>>>>>
>>>>>>>> I have a tiny project that essentially duplicates the
>>>>>>>> DaisyCsoundProcess example, the only differences in the code being the
>>>>>>>> changes names and the contents of csdText.
>>>>>>>>
>>>>>>>> Here's the UDO I'm using, which works fine with standalone Csound.
>>>>>>>> It takes an input signal and turns it into a stereo output  signal with a
>>>>>>>> binaural beat. When it's executed on the Daisy, I can sort of hear the
>>>>>>>> output, but it's very noisy. Is there anything in this code that you would
>>>>>>>> not expect to work on the Daisy?
>>>>>>>>
>>>>>>>>     opcode binauralize, aa, ak
>>>>>>>>       ain,kdiff xin
>>>>>>>>
>>>>>>>>       ; take it apart
>>>>>>>>       fsig pvsanal ain, 2048, 2048/4, 2048, 1
>>>>>>>>
>>>>>>>>       ; determine pitches
>>>>>>>>       ; kcent, kamp pvspitch fsig, 0.1
>>>>>>>>       kcent pvscent fsig
>>>>>>>>
>>>>>>>>       if (kcent > 0) && (kdiff > 0) then
>>>>>>>>         kdiff /= 2
>>>>>>>>         krat1 = (kcent + kdiff) / kcent
>>>>>>>>         krat2 = (kcent - kdiff) / kcent
>>>>>>>>       else
>>>>>>>>         krat1 = 1
>>>>>>>>         krat2 = 1
>>>>>>>>       endif
>>>>>>>>
>>>>>>>>       ; create derived streams with shifted pitches
>>>>>>>>       fsig2 = fsig
>>>>>>>>       fbinL pvscale fsig,  krat1, 0
>>>>>>>>       fbinR pvscale fsig2, krat2, 0
>>>>>>>>
>>>>>>>>       ; put it back together
>>>>>>>>       aoutL pvsynth fbinL
>>>>>>>>       aoutR pvsynth fbinR
>>>>>>>>
>>>>>>>>       xout aoutL, aoutR
>>>>>>>>     endop
>>>>>>>>
>>>>>>>> <daisyCsoundVersio.h>
>>>
>>>