Date: Tue, 23 Apr 2013 10:47:19 -0700 From: Craig Leres <leres@ee.lbl.gov> To: Lev Serebryakov <lev@FreeBSD.org> Cc: freebsd-multimedia@freebsd.org Subject: Re: Dragonfly USB DAC under 9.1-RELEASE Message-ID: <5176C927.5040200@ee.lbl.gov> In-Reply-To: <1741040117.20130423171849@serebryakov.spb.ru> References: <51732A63.9010001@ee.lbl.gov> <51740C56.3000907@bitfrost.no> <1741040117.20130423171849@serebryakov.spb.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
On 04/23/13 06:18, Lev Serebryakov wrote:
> Dragonfly DAC is async DAC, not adaptive one, which use async mode for
> isochronious transfers (not very common mode, but standard one for
> sure, since USB 1.1) and local clock source for DAC itself.
I guess the audio defects I was hearing with the 9.1-RELEASE dev/sound
subsystem point to a bug with sound-related async-isochronous transfers.
> Also, it squeeze maximum from USB 1.1 (96/24) without being USB 2.0
> audio device, as far as I know, but I may be wrong here.
It's a full speed device:
hot 5 % usbconfig -d 2.2
ugen2.2: <AudioQuest DragonFly AudioQuest inc.> at usbus2, cfg=0
md=HOST spd=FULL (12Mbps) pwr=ON
Craig
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5176C927.5040200>