From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clemens Ladisch Subject: Re: [PATCH] add Steinberg UR44 USB Audio Interface support to quirks-table Date: Mon, 10 Mar 2014 16:40:52 +0100 Message-ID: <531DDD04.5050902@ladisch.de> References: <1394388767-23658-1-git-send-email-cyrus@bobobeach.com> <531DAB14.5080201@ladisch.de> <76F78615-8762-4A6C-B601-97380805F450@bobobeach.com> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: quoted-printable Return-path: Received: from dehamd003.servertools24.de (dehamd003.servertools24.de [31.47.254.18]) by alsa0.perex.cz (Postfix) with ESMTP id DE11726571F for ; Mon, 10 Mar 2014 16:40:53 +0100 (CET) In-Reply-To: <76F78615-8762-4A6C-B601-97380805F450@bobobeach.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Cyrus Harmon , alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Cyrus Harmon wrote: > The attached patch provides support for the Steinberg UR44 USB Audio > Interface. It=92s nothing more than Clemens=92 patch to support the UR22, > with the device ID modified for the UR44. The patch was tested with > kernel versions 3.12.11 and 3.12.12 and I have primarily used it with > a PREEMPT RT-patched 3.12.12-rt kernel. In theory, kernel 3.11 and later should support this device without a quirk entry. I guess it actually does not? > I should note that on one of the systems that I used to test the patch > I was never able to achieve xrun-free JACK performance at -p256 -n3 as > I would invariably see xruns roughly once every minute. This sounds as if the playback stream needs to be synchronized to the recording stream. What is the output of "lsusb -v" for this device? Regards, Clemens