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

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>
>
>