Torstein, list; On Tue, Apr 9, 2013 at 12:34 AM, Torstein Hegge <hegge@xxxxxxxxxxx> wrote: > On Mon, Apr 08, 2013 at 18:28:30 -0700, chris hermansen wrote: [..] >> Hmm that was a bit of a slip of the brain. Anyway, I'm actually back >> in the same general vicinity as the Bifrost and can do some more >> testing. >> >> Torstein, is there anything specific you want me to try, or just patch >> up the kernel and have at it? > > The latest iteration of the patch is included in the 3.9-rc6 kernel. You > can try a plain 3.9-rc6 kernel without any modifications. So, I've updated my aging Toshiba "test bed" to the latest Ubuntu 13.04 release and grabbed the 3.9-rc6 kernel from http://kernel.ubuntu.com for testing. Trying out a bunch of songs with no noise, that's great news! But now something else seems weird. When I play a 96/24 file through plughw corresponding to the Schiit, I see this: sudo aplay -vD plughw:CARD=Interface,DEV=0 2L* [sudo] password for clh: Home directory not accessible: Permission denied Playing WAVE '2L50SACD_tr1_96k_stereo.wav' : Signed 24 bit Little Endian in 3bytes, Rate 96000 Hz, Stereo Plug PCM: Linear conversion PCM (S16_LE) Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S24_3LE subformat : STD channels : 2 rate : 96000 exact rate : 96000 (96000/1) msbits : 24 buffer_size : 48000 period_size : 12000 period_time : 125000 tstamp_mode : NONE period_step : 1 avail_min : 12000 period_event : 0 start_threshold : 48000 stop_threshold : 48000 silence_threshold: 0 silence_size : 0 boundary : 1572864000 Slave: Hardware PCM card 1 'Schiit USB Interface' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 96000 exact rate : 96000 (96000/1) msbits : 16 buffer_size : 48000 period_size : 12000 period_time : 125000 tstamp_mode : NONE period_step : 1 avail_min : 12000 period_event : 0 start_threshold : 48000 stop_threshold : 48000 silence_threshold: 0 silence_size : 0 boundary : 1572864000 appl_ptr : 0 hw_ptr : 0 ^CAborted by signal Interrupt... Ie the 24bit data is getting downsampled to 16 bits! It also seems like "stream0" for the Schiit only plays back 16bit data cat stream0 CMEDIA Schiit USB Interface at usb-0000:00:13.2-3, high speed : USB Audio Playback: Status: Stop Interface 1 Altset 1 Format: S16_LE Channels: 2 Endpoint: 5 OUT (ASYNC) Rates: 44100, 48000, 88200, 96000, 192000 Data packet interval: 125 us Capture: Status: Stop Interface 4 Altset 1 Format: S16_LE Channels: 2 Endpoint: 8 IN (ASYNC) Rates: 44100, 48000, 88200, 96000, 192000 Data packet interval: 125 us Interface 4 Altset 2 Format: S32_LE Channels: 2 Endpoint: 8 IN (ASYNC) Rates: 44100, 48000, 88200, 96000, 192000 Data packet interval: 125 us whereas stream1 shows both a 16 and 32 bit capability cat stream1 CMEDIA Schiit USB Interface at usb-0000:00:13.2-3, high speed : USB Audio #1 Playback: Status: Stop Interface 2 Altset 1 Format: S16_LE Channels: 2 Endpoint: 6 OUT (ASYNC) Rates: 44100, 48000, 88200, 96000, 176400, 192000 Data packet interval: 125 us Interface 2 Altset 2 Format: S32_LE Channels: 2 Endpoint: 6 OUT (ASYNC) Rates: 44100, 48000, 88200, 96000, 176400, 192000 Data packet interval: 125 us Capture: Status: Stop Interface 3 Altset 1 Format: S16_LE Channels: 2 Endpoint: 9 IN (ASYNC) Rates: 44100, 48000, 88200, 96000, 192000 Data packet interval: 125 us Interface 3 Altset 2 Format: S32_LE Channels: 2 Endpoint: 9 IN (ASYNC) Rates: 44100, 48000, 88200, 96000, 192000 Data packet interval: 125 us The problem is, stream1 and higher don't seem to be connected to the rest of the DAC. Also this stream0 looks markedly different than the version I displayed back on 3 March. Help? -- Chris Hermansen · clhermansen "at" gmail "dot" com C'est ma façon de parler. ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
