Messages in this thread | | | Date | Tue, 25 Aug 1998 02:23:10 -0400 (EDT) | From | Gregory Maxwell <> | Subject | Re: Full duplex in sound driver? |
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On Tue, 25 Aug 1998, Richard Gooch wrote:
> 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?
Nope, you get 8bit/sample in one direction and 16bits/sample in the other.
It's good enough for internet phone apps.
> > 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.
Voice is okay with linear 8 bits. But it would be nice if the SB16 could at least do 16bit linear and give 8bit ulaw, that sounds quite a bit better. Oh well..
What cards does Linux support full duplex on?
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