Re: Full duplex in sound driver?

Richard Gooch (rgooch@atnf.csiro.au)
Tue, 25 Aug 1998 15:02:13 +1000

Alan Cox writes:
> > > The SB16 can do full duplex, but you have to jump through hoops to do it.
> > > And the result isn't all that great, from what I've heard.
> >
> > Can you elaborate? Is there crosstalk between the input and output, or
> > other such hardware limitations?
>
> You are stuck with 8bit in one direction, 16bit in the other, the
> two channels arent that independant on rates etc either

Are you saying that the samples are limited to 8 bit one way and 16
the other way?
Or are you just saying that there are twice as many DMA cycles in one
direction?

> Within the limits its still very useful and I consider it a flaw
> we dont support it. Its well good enough for stuff like internet voice
> apps

I had a quick play with 8 bit voice and there was a bit of
distortion. With 16 bits it was fine. Haven't had time to play with it
any further, though.

Regards,

Richard....

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