From owner-freebsd-multimedia@FreeBSD.ORG Tue Apr 23 13:18:53 2013 Return-Path: Delivered-To: freebsd-multimedia@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 1F453A67 for ; Tue, 23 Apr 2013 13:18:53 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: from onlyone.friendlyhosting.spb.ru (onlyone.friendlyhosting.spb.ru [IPv6:2a01:4f8:131:60a2::2]) by mx1.freebsd.org (Postfix) with ESMTP id DB629116D for ; Tue, 23 Apr 2013 13:18:52 +0000 (UTC) Received: from lion.home.serebryakov.spb.ru (unknown [IPv6:2001:470:923f:1:cc41:618e:ebfd:3416]) (Authenticated sender: lev@serebryakov.spb.ru) by onlyone.friendlyhosting.spb.ru (Postfix) with ESMTPA id F400D4AC58; Tue, 23 Apr 2013 17:18:51 +0400 (MSK) Date: Tue, 23 Apr 2013 17:18:49 +0400 From: Lev Serebryakov X-Priority: 3 (Normal) Message-ID: <1741040117.20130423171849@serebryakov.spb.ru> To: Hans Petter Selasky Subject: Re: Dragonfly USB DAC under 9.1-RELEASE In-Reply-To: <51740C56.3000907@bitfrost.no> References: <51732A63.9010001@ee.lbl.gov> <51740C56.3000907@bitfrost.no> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: freebsd-multimedia@freebsd.org X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Apr 2013 13:18:53 -0000 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