[Techtalk] o great audio geeks... USB a/d converters
carla at bratgrrl.com
Thu Aug 28 13:59:13 UTC 2008
On Friday 22 August 2008 15:58:38 Michelle Konzack wrote:
> Am 2008-08-11 10:23:51, schrieb Walt:
> > They replace the sound card, at least in my experience
> This is technical wrong, since it ADD a soundcard.
Well sorry for not phrasing the question better, though I think it was clear I
was asking if I still needed a soundcard when recording with a ADC/DAC USB
device. The answer to that is no.
> So if you have a
> 7-Port USB-Hub and add 7 Mictophones, for a Band, you will get seven
> /dev/dsp* and have the hell to set it up... ALSA does only recognize
> one by default so you have the get the ID's of the devices, setup UDEV
> rules to fixe it to a Device number and then setup one file (you can
> better add and remove it) per device in /etc/hotplug/...
That's not what happened with my new MobilePre. Plugged it in, opened
Audacity, selected the recording and playback sources in the Audacity
preferences, and it Just Worked. I had two mics and a guitar plugged in, and
Audacity automatically opened a new track for each channel. The gain controls
on the MobilePre controlled the volume for the mics. Plugged in a headphone
for monitoring (lots of plugins on a little device!) and I was ready to rock.
BTW, anyone wanting a MobilePre be sure you get the new one, which is black
and silver. The old one is blue and silver, and requires a firmware loader.
There are instructions all over the web for configuring this on Linux; I'd
rather just plug the thing in :)
Do you mean a 7-port USB ADC/DAC? Or do you really mean a hub? That many USB
ports aren't going to do you any good anyway- the USB bus can't handle all
those inputs without data collisions, so your sound quality goes to heck. You
need Firewire for that kind of load. USB works fine for 1-4 channels on a
reasonably powerful computer, and you don't do anything else while you're
check out the shiny new Linux Networking Cookbook!
Chock full o' step-by-step howtos for network admins!
many more Linux howtos at
More information about the Techtalk