From mboxrd@z Thu Jan 1 00:00:00 1970 From: Clemens Ladisch Subject: Re: Edirol UA-25 Date: Wed, 11 Aug 2004 11:02:26 +0200 (METDST) Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: References: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Content-Transfer-Encoding: 7BIT Return-path: In-reply-to: Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Matthias Nagorni Cc: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org Matthias Nagorni wrote: > what is the status regarding ALSA support for the new Edirol UA-25 > ? > I heard that Edirol takes a lot of care to obey the USB audio > specs, so perhaps it works out-of-the-box with ALSA ? If a device obeys the USB audio specs, Windows will use the standard Microsoft USB Audio driver to handle it -- but this driver has (had) quite a few restrictions in older Windows versions, so things like higher sample rates or MIDI wouldn't be available. Therefore, most Edirol devices have an "Advanced Driver" switch to select between standard-but-restricted and advanced-but-needs-special-driver modes. ALSA will support the UA-25 in standard mode, but then the device has only 16 bits at 44.1 kHz and (probably) no MIDI. To support MIDI I need to take a look at the Windows driver to determine the product ID and interface numbers. (The driver isn't yet on Edirol's driver page.) To support advanced sample formats, somebody has to show the "lsusb -v" output of the device so that a quirk entry can be added to the driver. > It might be that the UA-25 uses USB 2.0. It doesn't, otherwise there would be no reason to disallow full duplex at 96 kHz. > Would this pose any problem ? I think that the USB 2.0 support in the driver might work, and that the problems with the two USB 2.0 devices known so far are caused by something else. Regards, Clemens ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285