Daniel and liist; Daniel, I wish I could reward your patience with a positive report, but I'm not there yet! On Mon, Sep 10, 2012 at 5:06 PM, Daniel Mack <zonque@xxxxxxxxx> wrote: > > Sorry man, I think what you need to follow is this one instead: > > https://wiki.ubuntu.com/KernelTeam/GitKernelBuild Those instructions are much easier for an old guy like me to follow! In passing there was one comment that stumped me on that page: "In addition, if you want to build from a git non-HEAD version..." I decided to follow that instruction even though I wasn't sure if it was correct. The build and install appeared to work just fine, though it seems one no longer needs to run the "update-initramfs" nor "update-grub" as they are executed by the dpkg on the image file. The system rebooted fine, and according to uname -a I am now running 3.6.0-rc3-custom #1 SMP Tue Sep 11 10:02:55 PDT 2012 i686 athlon i686 GNU/Linux[ which seems about right. Finally, just to check that the patch is really there: clh@nice:~/src/sound$ grep -i schiit sound/usb/quirks.c case USB_ID(0x0d8c, 0x0304): /* CMEDIA - Schiit USB Interface */ so that looks ok too. So - all good, I guess! Except that the !@)#!#*&$ thing still doesn't work: using Guayadeque 3.5- with the output device set to hw:1,0 which is my Schiit Bifrost If I start by playing a 44.1 16bit file, I get great sound. If I then switch to a 192 24bit file, I can hear the elements of the melody but the instruments all sound completely unlike they are supposed to - a sort of tinny, grinding character. If I then stop and restart the 192 24bit file, most of the time it soulnds just fine. Same problem occurs now when I switch back to a 44.1 16 bit file. Looking at the /proc/asound/card1/stream0 file, when the 192k 24bit file is playing poorly, it looks like this: CMEDIA Schiit USB Interface at usb-0000:00:13.5-5, high speed : USB Audio Playback: Status: Running Interface = 1 Altset = 2 Packet Size = 208 Momentary freq = 176426 Hz (0x16.0da0) Feedback Format = 10.14 Packet Size = 0 Momentary freq = 192000 Hz (0x18.0000) Interface 1 Altset 1 Format: S16_LE Channels: 2 Endpoint: 5 OUT (ASYNC) Rates: 44100, 48000, 88200, 96000, 192000 Data packet interval: 125 us Interface 1 Altset 2 Format: S32_LE Channels: 2 Endpoint: 5 OUT (ASYNC) Rates: 44100, 48000, 88200, 96000, 192000 Data packet interval: 125 us (note the momentary frequenccy is closer to 176k than 192k) Once I stop and restart it, the file looks like: CMEDIA Schiit USB Interface at usb-0000:00:13.5-5, high speed : USB Audio Playback: Status: Running Interface = 1 Altset = 2 Packet Size = 208 Momentary freq = 192027 Hz (0x18.00e0) Feedback Format = 8.16 Packet Size = 0 Momentary freq = 192000 Hz (0x18.0000) Interface 1 Altset 1 Format: S16_LE Channels: 2 Endpoint: 5 OUT (ASYNC) Rates: 44100, 48000, 88200, 96000, 192000 Data packet interval: 125 us Interface 1 Altset 2 Format: S32_LE Channels: 2 Endpoint: 5 OUT (ASYNC) Rates: 44100, 48000, 88200, 96000, 192000 Data packet interval: 125 us Going back the other way, the momentary frequency line first looks like: Momentary freq = 48007 Hz (0x6.0038) then after re-start like this: Momentary freq = 44106 Hz (0x5.8368) -- Chris Hermansen · clhermansen@xxxxxxxxx C'est ma façon de parler. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
