On 28.09.2012 04:55, Jeffrey Barish wrote: > 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. You could as well just wait for the next ppa kernel and install that one form the package once it's there. http://kernel.ubuntu.com/~kernel-ppa/mainline/ There was unfortunately one small regression in the last versions that I just fixed, so be sure to wait for one more packaged release or even for 3.6-final. > Out of curiousity, are you aware of any specific characteristics of the old > snd-usb driver that could account for what I am experiencing? No, but it would be way easier to have a look into that if it also happens with the current version :) Daniel ------------------------------------------------------------------------------ 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
