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Date:      Fri, 08 Mar 1996 12:18:09 +1000
From:      Stephen Hocking <sysseh@devetir.qld.gov.au>
To:        multimedia@freebsd.org
Cc:        hannu@voxware.pp.fi, Hannu.Savolainen@cctap.carel.fi
Subject:   Full duplex devices & the SB16
Message-ID:  <199603080218.CAA24602@netfl15a.devetir.qld.gov.au>

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I've been having a bit of a think about this. As you know, it is possible (and 
I have some DOS code) to do full duplex audio with the SB16, with the 16bit 
channel in one direction and the 8bit in the other. This does not fit in with 
our model of the world (identical capabilities both ways) so what I was 
thinking of was converting the data to/from 16/bit when copying in/out to/from 
the user. For cards like the PAS16 we could also do something similar, with 
stereo<->mono conversion as well. I don't know about rate conversion where the 
different channels have different limits on the maximum sampling rate (such as 
the PAS16). I could swipe some code from the NAS server for this.

	Stephen
-- 

        I do not speak for the Worker's Compensation Board of Queensland -
                     They don't pay me enough for that!





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