From: Lennart Poettering <mznyfn@0pointer.de>
To: ALSA Development Mailing List <alsa-devel@alsa-project.org>
Subject: Only one element for multichannel mixer controls please!
Date: Sat, 25 Oct 2008 01:49:33 +0200 [thread overview]
Message-ID: <20081024234932.GA17812@tango.0pointer.de> (raw)
Heya!
It seems that quite a few ALSA drivers for multichannel sound cards
export three seperate stereo mixer controls to control front, rear and
center/lfe independantly. That sucks because a client (such as
PulseAudio) cannot make use of this. Instead they should export a
single 6ch mixer control!
The "amixer scontents" output looks very strange for these drivers
since it lists a "Rear" control that as a "Front Left" and a "Front
Right" channel. So, what is it now: front or rear?
Is there any reason for this current driver behaviour? I mean, the
mixer knows channel ids like SND_MIXER_SCHN_REAR_LEFT perfectly
well. Or is it that those devices have some devices joined and this
cannot be expressd with a single boolean "joined" for each
control?
Please enlighten me!
Lennart
--
Lennart Poettering Red Hat, Inc.
lennart [at] poettering [dot] net ICQ# 11060553
http://0pointer.net/lennart/ GnuPG 0x1A015CC4
next reply other threads:[~2008-10-24 23:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-24 23:49 Lennart Poettering [this message]
2008-10-27 8:19 ` Only one element for multichannel mixer controls please! Takashi Iwai
2008-10-27 8:53 ` Jaroslav Kysela
2008-10-27 9:09 ` Takashi Iwai
2008-10-27 9:20 ` Jaroslav Kysela
2008-10-27 9:46 ` Takashi Iwai
2008-10-27 10:12 ` Jaroslav Kysela
2008-10-27 10:48 ` Takashi Iwai
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