20 Jul
2013
20 Jul
'13
4:08 p.m.
Update:
I have no idea why MPlayer now work as expected (with floatle outputs)
when starting Jack with my 16 bit USB module:
jackd -r -d alsa -d hw:2 -P -o 8 -z shaped
Although it would have been nice to use zita-j2a for resampling...
What was the problem then? I hope it's not intermittent,
and that it's not only related to the device between my ears. :)
Then I tried to add the 2 channels internal sound device:
zita-j2a -v -d hw:1
(no sound)
zita-j2a -v -d hw:1 -L
(no sound)
Salut
--
Marc
I wrote:
Bonjour Fons.
Fons Adriaensen <fons(a)linuxaudio.org> a écrit :
First of all, what are you trying to achieve ?
I don't want to use "depth down-sampled" channels with ambdec.
Zita-j2a is normally used to add a playback alsa
device to Jack.
For example, if you use Jack with the internal soundcard, then
starting zita-j2a with the USB card will add the outputs of the
USB card to jack, you can then play via both cards at the same time.
As I wrote, zita-j2a stays silent when using it as you explained.
As said, Jack is *always* using floating point.
Excellent!
But when running jackd with my 16bit USB module, Mplayer is converting
its output to 16bit. When running Jack with a 24bit sound card or the
aloop device, Mplayer's output is floatle (as expected), even when
forcing Jack to run in 16bit with the "--short" option.
Another problem: when starting Jack with a 2 channels sound card,
Mplayer can't output more than 2 channels.
So I suppose that Mplayer is misbehaving.
It will convert the playback channels to whatever
the sound card can
handle.
So far, no sound is coming out of zita-j2a.
Here's how I started it:
zita-j2a -v -d hw:2 -c 8
playback :
nchan : 8
fsamp : 48000
fsize : 256
nfrag : 2
format : S16_LE
capture : not enabled
Starting synchronisation.
Tchao
--
Marc