From: Florian Schmidt <mista.tapas@gmx.net>
To: pat@dumaisnet.ca
Cc: Clemens Ladisch <clemens@ladisch.de>, alsa-devel@lists.sourceforge.net
Subject: Re: hardware channel mixing
Date: Fri, 3 Sep 2004 15:58:01 +0200 [thread overview]
Message-ID: <20040903155801.1ae48548@mango.fruits.de> (raw)
In-Reply-To: <Pine.LNX.4.58.0409030913180.9962@pat.dumaisnet.ca>
On Fri, 3 Sep 2004 09:15:06 -0400 (EDT)
Patrick Dumais <pat@dumaisnet.ca> wrote:
>
> Thanks a lot, I've been looking for that information.
>
> So this would mean that the only solution would be to snd_pcm_open() a
> device for each sound file that I want to play simultenaously?
If you are programming an app that needs to play several sounds at once,
it is a very bad idea to rely on the hardware provifding hw mixing. Most
SC's do not provide hw mixing.
So the solution really is to do the mixing yourself before sending the
sound to the soundcard [mixing sounds is pretty trivial -> add them.
only take care about the headroom].
OTOH: if you write this app only for yourself and you know you will
always use a SC with hw mixing, feel free to use snd_pcm_open for every
sound you play..
flo
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next prev parent reply other threads:[~2004-09-03 13:58 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-29 15:03 hardware channel mixing Patrick Dumais
2004-09-03 12:59 ` Clemens Ladisch
2004-09-03 13:15 ` Patrick Dumais
2004-09-03 13:24 ` Clemens Ladisch
2004-09-03 13:58 ` Florian Schmidt [this message]
2004-09-03 14:04 ` Patrick Dumais
2004-09-03 14:31 ` Florian Schmidt
2004-09-03 14:34 ` Patrick Dumais
2004-09-03 15:23 ` Florian Schmidt
2004-09-07 5:04 ` Glenn Maynard
2004-09-03 23:30 ` Lee Revell
2004-09-04 1:19 ` Manuel Jander
2004-09-04 23:28 ` Lee Revell
2004-09-05 3:02 ` Manuel Jander
2004-09-05 5:06 ` Lee Revell
2004-09-05 18:12 ` Manuel Jander
2004-09-05 18:39 ` Lee Revell
2004-09-05 18:28 ` Lee Revell
2004-09-06 11:54 ` Jaroslav Kysela
2004-09-06 20:41 ` Lee Revell
2004-09-07 1:09 ` hardware channel mixing [EMU10K1 DMA] Manuel Jander
2004-09-07 4:47 ` Lee Revell
2004-09-07 6:53 ` Lee Revell
2004-09-07 8:23 ` Jaroslav Kysela
2004-09-07 18:26 ` Lee Revell
2004-09-07 19:16 ` Jaroslav Kysela
2004-09-07 19:34 ` Lee Revell
2004-09-07 19:41 ` Jaroslav Kysela
2004-09-07 19:46 ` Lee Revell
2004-09-07 19:48 ` Lee Revell
2004-09-07 19:52 ` Jaroslav Kysela
2004-09-07 20:06 ` Lee Revell
2004-09-08 22:49 ` Lee Revell
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