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>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070217.100629.-1297660600.imp>