21 Feb
2005
21 Feb
'05
1:12 p.m.
Spencer Russell wrote:
The US428 has 4 capture channels and 2 playback
channels. Capture
channels 3 and 4 are switchable between analog and digital. The
button to switch doesn't seem to do anything, though.
-spencer
On Mon, Feb 21, 2005 at 09:05:32AM +0000, Rui Nuno Capela wrote:
>
> BTW, shouldn't the US-428 have 8 playback channels, the US-224 have 4,
> and finally 2 for US-122?
>
I took a quick look into Karsten's original jackd usx2y_driver code and...
I'm affraid that the number of channels were being hardcoded as 2 for
capture and 2 for playback.
OTOH already in the current jack CVS trunk, the number of channels are
either given on the jackd command line (-i,-o) or taken from the maximum
allowed by the ALSA driver (via snd_pcm_hw_params_get_channels_max()).
Maybe its around here where the issue is? Karsten?
I could also check that the jackd usx2y specific code has support for no
more than 4 capture and 2 playback channels.
What happens when you start jackd explicitly for 4 input channels (-i4)?
e.g. jackd -R -d alsa -d hw:N[,2] -i4 -o2
I'll remember to try this myself, when I get home.
Take care.
--
rncbc aka Rui Nuno Capela
rncbc(a)rncbc.org