From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: Scott Jiang <scott.jiang.linux@gmail.com>, alsa-devel@alsa-project.org
Subject: Re: Have multiple opens removed on one device?
Date: Mon, 22 Aug 2011 12:21:43 +0100 [thread overview]
Message-ID: <20110822112143.GB9232@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <s5hipppsqe9.wl%tiwai@suse.de>
On Mon, Aug 22, 2011 at 12:15:58PM +0200, Takashi Iwai wrote:
> Scott Jiang wrote:
> > In kernel 2.6.34 I can use aplay to play audio at the same time, alsa
> > will mix the audio.
> No, kernel part doesn't do such a thing. If it's mixed, it must be
> in the user-space (either dmix or a daemon like pulseaudio), unless
> you hardware can do mixing by itself.
There *are* some cards (mostly older ones like emu10k) that support
multiple streams transparently but this has never been supported in
ASoC due a lack of hardware that can do it.
next prev parent reply other threads:[~2011-08-22 11:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-22 10:13 Have multiple opens removed on one device? Scott Jiang
2011-08-22 10:15 ` Takashi Iwai
2011-08-22 11:21 ` Mark Brown [this message]
2011-08-29 10:11 ` Scott Jiang
2011-09-01 3:43 ` Scott Jiang
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