Subject: Re: [linux-audio-dev] introB
From: Paul Barton-Davis (pbd_AT_Op.Net)
Date: Sun Dec 31 2000 - 19:27:48 EET
>> I am about to... I am working on a embedded project that will require 2
>> copies of the same application to access the sound device and have thier
>> output one of the 2 channels of stereo output.
>> ex Copy A -> L channel
>> Copy B -> R channel
>
>That can be done at least with commercial OSS. It now has input multiplexer.
it can be done with the kernel drivers/free OSS/ALSA for any card
supporting h/w mixing (which is most modern/new cards). for example,
32 applications can open (/dev/dsp|/dev/snd/pcmN0Dn) if that device
file refers to a trident-based sound card. most of the ESS cards and
the SB series can do this as well.
the h/w mixing solution has no latency impact at all; the s/w mixing
solution does have some, depending on how its implemented.
--p
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