I've been trying this for a while, but I've been unable to get anything to record from inputs C and D on my Tascam US-428. Currently I'm using the 1.14-rc alsa driver. I've finally managed to get down to 5.33 ms latency using Ingo Molnar's realtime kernel patches and setting the USB interrupt handler to SCHED_FIFO and priority 80, but I'm only able to record from inputs A/B. Inputs C/D are the instrument-level (guitar, bass, etc.) inputs, shared with the S/PDIF input. I've tried 16-bit and 24-bit sample formats, both supported sampling rates, etc. I get the following error from arecord: nitrogen@nitrogen-desktop:~/devel/alsapassthru$ arecord -D hw:1,1 -f S24_3LE -r 48000 -c 2 test.wav Recording WAVE 'test.wav' : Signed 24 bit Little Endian in 3bytes, Rate 48000 Hz, Stereo arecord: set_params:961: Unable to install hw params: ACCESS: RW_INTERLEAVED FORMAT: S24_3LE SUBFORMAT: STD SAMPLE_BITS: 24 FRAME_BITS: 48 CHANNELS: 2 RATE: 48000 PERIOD_TIME: 56875 PERIOD_SIZE: 2730 PERIOD_BYTES: 16380 PERIODS: (4 5) BUFFER_TIME: (227541 227542) BUFFER_SIZE: 10922 BUFFER_BYTES: 65532 TICK_TIME: 1000 ... and from jackd: configuring for 48000Hz, period = 64 frames, buffer = 4 periods Note: audio device hw:1,1 doesn't support a 32bit sample format so JACK will try a 24bit format instead nperiods = 2 for capture ALSA: cannot set hardware parameters for capture ALSA: cannot configure capture channel In my own software, all initialization calls succeed until it gets to snd_pcm_hw_params(). Any help would be greatly appreciated. The input monitor function for inputs C/D does work. If work needs to be done on the driver and/or us428control, I would be willing to help out. I found that in the ChangeLog for ALSA 1.0.6 a notice that inputs C/D were disabled "for this version only" - is that still the case? Mike Bourgeous ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
