On 1/29/07, Matt Savigear <mcs_alsa@xxxxxxxxxxxx> wrote: > On Sun, 28 Jan 2007 19:09:44 -0700 > "Michael Bourgeous" <sts.nitrogen@xxxxxxxxx> wrote: > > 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. > > (snip) > > Hi Michael, > > The two sets of inputs seem to be two separate devices for ALSA's > purposes, which means JACK cannot use both without help. > > Try the parameter "-D hw:1,2" when launching jackd - this should > represent a pseudo-device created as a patch to jack (but now > incorporated into the release) and combining the two hardware input > devices (2 channels each) into one in software. You should be able to > start jackd with four inputs using this. > > I'm afraid I don't know the implications of this for your own > development. > > -- > > Cheers, > > Matt. Hmm.. I tried using a multi+ttable setup in my .asoundrc, but I'm getting problems with just using C/D by itself, let alone together with A/B. Based on my reading I thought that hw:1,2 wasn't an actual audio device, but rather used by us428control to run the sliders, and the usx2y firmware loader to upload the firmware. When I use it with arecord -D hw:1,2 -c 4 the .wav file contains a dump of some kernel memory(!). jackd -d alsa -d hw:1,2 followed by qjackctl shows 4 input and 2 output ports, but when connecting input 3 to both outputs I hear no audio, and jackd dies after about 20 seconds. if I try to make it realtime, either with chrt or with jackd -R, the jackd watchdog kills jackd immediately. Does any of this sound familiar to anyone? Okay, now for the good news: I unloaded the snd-usb-usx2y module, power cycled my US-428, used chrt to set the IRQ handler for my USB ports to SCHED_FIFO at priority 80, and with jackd and hw:1,2 I can use 2 64 frame periods for 2.67ms latency, better than I was getting with hw:1,0 and only two in/two out. I'd still like to be able to use arecord, though. Is using 1.0.11 alsa-utils with 1.0.14 drivers a problem? Mike ------------------------------------------------------------------------- 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
