8 Nov
2010
8 Nov
'10
7:22 p.m.
On Monday 08 November 2010 11:52:26 Ken Restivo wrote:
On Mon, Nov 08, 2010 at 02:09:35PM +0100, Hans Wilmers
wrote:
Can't you use those alsa modules (alsa-out or whatever - memory is dim atm) to
bring the other two into the fold?
On 11/08/2010 08:55 AM, Ken Restivo wrote:
I use the FastTrack Pro USB live, currently with 44.1k/16 and get only two
output channels that JACK can use. The other two channels show up as a
different ALSA interface, which makes it useless, since JACK can only use
channels that are all in the same interface. This is why I'm looking for a
unit that can do 4 channells output ON THE SAME INTERFACE. This is
important, much moreso than 24 bit support. A mythical beast, rumored to exist, but never
actually seen. Others have
tried, but failed, to locate it. I now join the search. This beast is:
1) USB 1.0 "class compliant"-- NOT USB 2.0 -- and thus works with Linux
2) Is well and truly supported by ALSA.
3) Has FOUR outputs and 2-4 inputs, all usable from within JACK, with
good professional quality DAC/ADCs. 4) The outputs and inputs are
balanced and applicable for low or high impedance (probably with a
switch), and have TRS 1/4" jacks or XLR or both.
5) Does not cost an arm and a leg.
This does not mean the FastTrack Pro! Sure it SAYS it has 4 channels,
but only two are accessible from JACK. I have one and have used it for
years, but I now need more outputs. And, also, the output of the "other"
4 channels is just RCAs. I need 4 channels output, USB1.0,
44.1Khz/24bit. I could use a cheap 5:1 home-theater USB fob type
interface, but the sound quality would probably suck, and it sure won't
give me balanced outs.
Does this Unicorn exist? Anyone seen one?
No, but if you can live with 48/16 instead of 24 bit, and with
RCA-outputs, the (no longer produced) Terratec "Producer Phase24 USB"
does the trick. I just tested this. It might just be that the Terratec
"DMX 6Fire USB" works the same way, but somebody else should confirm
that.
Btw.: Did you try the FastTrack Pro with 48/16? Choosing between 48/24
and 48/16 also means choosing between 2 or 6 output channels on my USB
interface.
-ken
all the best,
drew