[PD] issues trying to use libpd_process_float()

[Eric Lennartson]

I knew I was missing something simple!

Thanks!

On Sun, 4 Jun 2023 at 13:19, William Brent <william.brent at gmail.com> wrote:

> Hi Eric,
>
> Sounds like you might want to be using libpd_process_raw() instead. If I'm
> remembering correctly, libpd_process_float() expects interleaved samples in
> the buffer you feed it, and process_raw() expects blocks of samples
> interleaved by channel.
>
>
>
> On Sat, Jun 3, 2023 at 3:50 PM Eric Lennartson <lennartsoneric at gmail.com>
> wrote:
>
>> Hello all,
>>
>> I have been experimenting with using python and libpd, and for the most
>> part it works well.
>> However, I have been trying to use the other processing methods such as
>> libpd_process_float() or libpd_process_double(), but when I do I just get
>> crazy noise.
>> The code I'm working with is just a modified version of the echo.py file
>> in the samples section of the libpd github page. Basically, all I have done
>> is change the pyaudio format to paFloat32, created a dummy buffer to pass
>> to the process method with array.array('f', range(libpd_blocksize()) and
>> called libpd_process_float() instead. I did check to see if the format was
>> supported using pyaudio's is_format_supported() method and it returned
>> True. The pd patch itself is just a quite sine tone straight into the dac.
>> So I'm really scratching my head here, what am I missing?
>>
>> Thanks for any insight you can provide.
>>
>> Eric
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>
>
> --
> William Brent
>
> “Great minds flock together”
> Conflations: conversational idiom for the 21st century
>
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>
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