From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Christian Hoff" Subject: Creative X-Fi 51 Pro Support Date: Sat, 15 Oct 2011 16:16:45 +0200 Message-ID: <20111015141645.203040@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mailout-de.gmx.net (mailout-de.gmx.net [213.165.64.22]) by alsa0.perex.cz (Postfix) with SMTP id BA61024593 for ; Sat, 15 Oct 2011 16:16:47 +0200 (CEST) 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 List-Id: alsa-devel@alsa-project.org Dear all, I just bough and installed a new Creative X-Fi 51 Pro USB sound card. The card works, but it recognized as a full speed 1.1 device instead of high speed (usb 2.0). This causes some limitations - for example I cannot play 5.1ch 24bit/96000Hz audio streams, but only 5.1ch 16/44000Hz. There are various other reports of this behavior in the net(for example [1]), but so far nobody was able to come up with a solution. I would like to fix this in ALSA - probably some kind of vendor-specific quirk is needed which tells the card that it can safely turn on its high-speed capabilities. My assumption is that Creative just disabled the USB high speed features by default because some other OS'es might have problems with audio class 1 devices running at high speed. Now what I would need is some sort of technical input from Creative. A technical documentation of the card or some sample code would be nice. Maybe they are going to send me the specs for their X-Fi 51 Pro if I ask, but the problem is whom at Creative should I ask? Or is there anyone who already has some technical docs for that card available? The reason why I ask is because e.g. the remote control quirks would have required some docs from Creative, so I assume Creative has been sending you technical input in the past. Thank you very much for any help on that matter. Regards, Christian Hoff [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/798795/comments/4 -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de