On Fri 28 September 2012 03:06:22 Daniel Mack wrote: > (adding back the mailing list - please don't drop it in replies) Oops. My bad. > On 28.09.2012 02:43, Jeffrey Barish wrote: > > On Fri 28 September 2012 02:02:05 you wrote: > >> On 28.09.2012 01:56, Jeffrey Barish wrote: > >>> I am using a USB DAC (HRT Music Streamer II) which operates in > >>> asynchronous mode. It works perfectly at sample rates up to 48 kHz. > >>> > >>> When I go to 88.2 or 96, it works perfectly sometimes. Most of the > >>> > >>> time I get ticks. When it starts playing without ticks, it will > >>> continue to play without ticks to the end of the track. A different USB > >>> DAC that operates in isochronous mode is able to play at the high sample > >>> rates without problem. > >> > >> Which kernel are you on? And please post the output of 'lsusb -v'. > > > > I am on the latest kernel, 3.2.0-31-generic > > That is not the latest kernel - we're currently close to the final > version of 3.6, and the snd-usb driver has seen major overhaul in the > last versions. > > So it would be interesting to know whether you see these effects when > running a kernel built from this git: > > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > > Daniel You seem to have me confused with someone who knows what he's doing. I meant that 3.2.0-31-generic was the latest kernel available from Ubuntu. You're proposing what sounds like a worthwhile experiment considering the major overhaul to the snd-usb driver, but I've never upgraded a kernel except from deb packages, so I'm quaking in my boots just thinking about it. Ooh, and I bet you're telling me that I would have to make the kernel. More quaking. Out of curiousity, are you aware of any specific characteristics of the old snd-usb driver that could account for what I am experiencing? Thanks for your suggestion. I will investigate further tomorrow. -- Jeffrey Barish ------------------------------------------------------------------------------ Got visibility? Most devs has no idea what their production app looks like. Find out how fast your code is with AppDynamics Lite. http://ad.doubleclick.net/clk;262219671;13503038;y? http://info.appdynamics.com/FreeJavaPerformanceDownload.html _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
