Brian Furey wrote:
> with the ALSA driver, what do the OSS substream mean?

There are no "OSS substreams".  ALSA PCM devices have substreams.  A
device with more than one substream can be opened multiple times
simultaneously.

> If you have a 2 main capture channels, how many substream would
> you have?

Depends on the hardware, and is completely unrelated to the number of
channels.

> Also the capture stream is supposed to operate at 8000
> Hz per second.

8000 Hz is just the default.

> Is it possible that it is actually say 8192, a value to the
> power-of-two?

It's 8000, for historical reasons (the standard rate of some telephony
codec, which was then used on some early UNIX systems, or something
like that).


HTH
Clemens




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