audio_buf_size in f_uac1.c

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Hello,

I was wondering where the audio_buf_size in f_uac1.c came from.

Why exactly was this value chosen, and what would I need to change if
I'd like to keep this value as low as possible to minimize latency?

I tried adjusting the size of this buffer, and it does help latency,
but this is just guesswork. Is there any way in determining the
minimum value this buffer can be set at? Maybe it depends on other
kernel parameters (tickrate?).

Any help regarding this buffer size would be appreciated.

Greetings
Jan De Kock
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