On Mon, Jul 28, 2008 at 6:01 PM, Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx> wrote: > > On Mon, 2008-07-28 at 17:51 +0200, Adrien DANIEL wrote: >> Thank you very much, that seems to come up to my expectations ! >> >> I take advantage of this thread to explain my thoughts. >> >> I was thinking about, for instance, an electric guitar with a built-in >> ADC, that could be plugged in a computer via a USB (or Firewire) >> cable, the guitar being recognized as a 'snd-usb-audio' device under >> the system. With this view in mind, it might be useful to get many >> "digital" instruments like that, as well as a DAC, all available in a >> single JACK server. > > JACK is not designed to work this way. it was designed around the > assumption that your instruments plug into some kind of audio interface > (not necessarily analog, it could be all digital). individual > instruments all showing up as distinct USB devices is really rather > outside of the design assumptions that JACK was started with. in > particular, there has long been a model within JACK that device > aggregation was the job of the OS audio services (ALSA, CoreAudio etc). > >> Will JACK2 be able to handle this ? I mean, you run jack2_start, and >> all the available (and desired) peripherals appear in the connections. >> :) > > its possible. i don't think this is part of the plan at present. a > future in which a USB hub is considered an audio patchbay, and audio > apps have to interrogate the USB bus to determine what is out there ... > well, its not inconceivable, but its not likely to take off, i think. > >> I suppose that it raises many issues like synchronization between >> different physical peripherals. Handling many peripherals as separated >> devices might not be optimal compared to one single device with >> multiple inputs/outputs, as well. And actually I am not sure this idea >> is really essential... :) > > not only is it essential, its really tending toward the silly. the > converters in those "USB guitars" are not really very good for the most > part, and besides a lot of people still strongly prefer mic-recorded well somebody uses good quality cards you see ;) http://www.io-sound.org/Guitars/Sahira/Sahira.html > instruments. oh, and did i mention that a given USB bus will get totally > saturated with very few channels, so to do this usefully for a bunch of > performers you would need a lot of USB busses to connect to. > > --p > > > > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user > -- .wmv , .wma , .pps along with all proprietary Windows formats won t be accepted and/or viewed.... _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
