[PD] Default buffer size?

[Olaf Matthes]

Hi David,

I had a look at s_nt.c and it seems that the default buffer size is

#define DEFBUFFER 30 /* default is about 30x6 = 180 msec! */

The minimum is 4 real(!)-dac-blocks (assuming 64 samples per block: 4 * (4 * 64) samples =  1024 samples =~ 23.2 ms ). The maximum is 100 blocks (580 ms).
Note that the calculation from milliseconds -> blocks in s_nt.c assumes 44.1kHz sample rate.


Olaf


> David Sabine schrieb:
>
> Hello,
>
> what is PD's default audio buffer size in Windows XP? This question has the following history:
>
> My command line:
>
> C:\pd\bin\pd.exe -verbose -listdev -resync -audiobuf 100 -soundoutdev 1 -outchannels 2 -soundindev 1 -inchannels 2 -nomidi
> Without -resync, dac~ or adc~ (i can't tell which) makes popping sounds and noise approximately 150 bpm.
>
> With -resync AND -audiobuf 100, pd gets stuck in a 'resyncing audio' loop upon startup.
>
> With -resync AND NOT -audiobuf, pd works like a charm...but I can't determine the latency of the input signal (i.e. I don't know the default size of the audio buffer).
>
>
>
> Many Thanks.
> Dave