Date: Sat, 17 Feb 2007 10:06:29 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: kazuhito@ph.noda.tus.ac.jp Cc: multimedia@freebsd.org Subject: Re: Sound Blaster USB? Message-ID: <20070217.100629.-1297660600.imp@bsdimp.com> In-Reply-To: <20070217.205042.835831436.kazuhito@ph.noda.tus.ac.jp> References: <20070216.151321.43011330.imp@bsdimp.com> <20070217.205042.835831436.kazuhito@ph.noda.tus.ac.jp>
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In message: <20070217.205042.835831436.kazuhito@ph.noda.tus.ac.jp>
Kazuhito HONDA <kazuhito@ph.noda.tus.ac.jp> writes:
: Its cause is that FreeBSD sound system is unfit for USB sound systems.
: Some USB sound devices have several mute knobs.
: But FreeBSD sound system has one mute knob only.
: Thus FreeBSD can't control mute knobs of USB sound devices.
:
: `SB Live! 24-bit External' makes the mute knob on
: when none is plugged in `phones'.
: FreeBSD can't change the mute knob from on to off.
: Thus you can't get any sound.
: If something is plugged from beginning,
: the mute knob is off, and you can get some sounds.
:
: `MASTER (PUSH-MUTE)'knob can change the mute status to on,
: but it can't change the mute status from on to off.
:
: At least, my `SB Live! 24-bit External' does that behaviors.
Honda-san,
thank you for this great explaination. Are the details for how to
program the device documented somewhere? Or do I just need to be
careful to always plug in the SB Live! USB with the head phones and
there's no hope for improvement?
Warner
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