Dragonfly USB DAC under 9.1-RELEASE

Lev Serebryakov lev at FreeBSD.org
Tue Apr 23 13:18:53 UTC 2013

Hello, Hans.
You wrote 21 апреля 2013 г., 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.

// Black Lion AKA Lev Serebryakov <lev at FreeBSD.org>

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