From mboxrd@z Thu Jan 1 00:00:00 1970 From: Karsten Wiese Subject: Re: TASCAM US-1641 Date: Thu, 25 Mar 2010 11:00:15 +0100 Message-ID: <201003251100.16073.fzuuzf@googlemail.com> References: <1269394483.6635.11.camel@eviltwin> <20100324055626.GH30801@buzzloop.caiaq.de> <1269468166.7429.7.camel@eviltwin> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mout7.freenet.de (mout7.freenet.de [195.4.92.97]) by alsa0.perex.cz (Postfix) with ESMTP id 377B82456A for ; Thu, 25 Mar 2010 11:00:22 +0100 (CET) In-Reply-To: <1269468166.7429.7.camel@eviltwin> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org Cc: Jan Depner List-Id: alsa-devel@alsa-project.org Am Mittwoch 24 M=E4rz 2010 schrieb Jan Depner: > = > = > > I suggest adding some printk()s to the driver and see what it actually > > does and which values it passes around. Most probably there is more > > differences in the data format, and descriptors and/or message blocks > > have different meanings for this hardware model. > > = > = > I did as suggested and got back reasonable appearing numbers for > rate, use_packsize, and period_frames of 44100, 36, and 256 respectively > but am not sure how to relate this to my interface. I heard the US-1641 uses bulk and/or iso packets, while US-122L uses iso on= ly. so snd_usb_us122l would need some deep tweaking. also all the incantation stuff looks propably different. > Is there some > documentation somewhere that would explain the output of lsusb -v with > respect to variable names in us122l.c. erm, no. there are the interface and endpoint numbers. > My problem here is that I don't > know what would actually be reasonable for this interface nor how to > find out. usbsnoop and/or the developers at http://usbaudio.com. > = > = > Many thanks for your help with this. Karsten had asked me to get > back with him if I got one of these but my email to him must have gone > to the spam filter as I haven't heard anything. no spam filters, just work and short hollidays. looking back at developing snd_usb_us122l, i'm unsure if I spent my time wi= sely: the actual hardware one can buy now doesn't talk to the driver anymore. and= i'm busy caring for real life, which i've been omitting a tad too much that tim= e. If in doubt, don't bother hacking on the tascam, enjoy spring instead! regards, Karsten