[linux-audio-user] US428 Channels 3 and 4

Rui Nuno Capela rncbc at rncbc.org
Mon Feb 21 04:05:32 EST 2005

Spencer Russell wrote:
> I'm using jackd 0.99.50, which I thought had Rui's usx2y patch.
> Perhaps I need to patch something manually?

Is this about having 4 playback ports on the jackd alsa_pcm backend driver?

To speak the truth, I've never seen such a setup, either with the (my) new
alsa driver (from jackd 0.99.42) nor with karten's original one. But
that's probable, due to the fact that I own a US-224, and I'm happy with 2
channels which, I repeat, its what I ever seen.

BTW, shouldn't the US-428 have 8 playback channels, the US-224 have 4, and
finally 2 for US-122?

Karsten, would you kindly checkon whether this makes sense? Is there
anything (that I) left behind? Things to check are about:

- using standard "alsa" driver code-path against "hw:N"
- using (my) experimental "alsa" driver against "hw:N,2" (rawusb)
- using yours original patch for the "usx2y" driver against "hw:N"

and see if whether there is any difference regarding the number of
channels for the US-428. IMO the correct number of channels should be
present on ALL of the above.

Feel free to point out if I did any mistake ;)

rncbc aka Rui Nuno Capela
rncbc at rncbc.org

> On Mon, Feb 21, 2005 at 12:28:32AM +0100, Karsten Wiese wrote:
>> Am Sonntag 20 Februar 2005 10:41 schrieb Spencer Russell:
>> > Hey all,
>> > So my US428 seems to be behaving now(although with the Layla20
>> > that I just bought, the tascam is being used more as a control
>> > surface then an audio interface). But I can't get any audio input
>> > on channels 3 and 4. Jack seems unable to start the tascam as a 4
>> > channel device. Is there something I have to do to enable those
>> > channels? Thanks
>> >
>> hmmmm, have you tried rui's addition to jack's alsa driver?
>> if so, it could be that one doesn't yet support channel 3+4.
>> don't know exactly, haven't checked yet.
>> currently you can use ch 3 and 4 with my usx2y jack driver.
>> best regards,
>> Karsten

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