Date: Tue, 23 Apr 2013 17:18:49 +0400 From: Lev Serebryakov <lev@FreeBSD.org> To: Hans Petter Selasky <hps@bitfrost.no> Cc: freebsd-multimedia@freebsd.org Subject: Re: Dragonfly USB DAC under 9.1-RELEASE Message-ID: <1741040117.20130423171849@serebryakov.spb.ru> In-Reply-To: <51740C56.3000907@bitfrost.no> References: <51732A63.9010001@ee.lbl.gov> <51740C56.3000907@bitfrost.no>
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Hello, Hans. You wrote 21 =D0=B0=D0=BF=D1=80=D0=B5=D0=BB=D1=8F 2013 =D0=B3., 19:57:10: HPS> I suspect your device uses rate adaption, and that it does not work HPS> properly. 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. 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. --=20 // Black Lion AKA Lev Serebryakov <lev@FreeBSD.org>
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