Re: [Jack-Devel] routing alsa through jack

In data domenica 29 dicembre 2013 02:44:08, Dominique Michel ha scritto:
> > $ cat /etc/modprobe.d/alsa-base.conf
> 
> > # autoloader aliases
> > install sound-slot-0 /sbin/modprobe snd-card-0
> 
> I don't have that part. I don't even know what this is.

Never mind, that's kmod stuff, it doesn't hurt, it only defines aliases.

> > # Cause optional modules to be loaded above generic modules
> > install snd /sbin/modprobe --ignore-install snd && { /sbin/modprobe
> > --quiet snd-ioctl32 ; /sbin/modprobe --quiet snd-seq ; : ; }
> > install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi && {
> > /sbin/modprobe --quiet snd-seq-midi ; : ; }
> > install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 && {
> > /sbin/modprobe --quiet snd-emu10k1-synth ; : ; }
> 
> I don't have that part either. And don't know what this is.

same as above

> 
> > # Keep snd-pcsp from beeing loaded as first soundcard
> > options snd-pcsp index=-2
> > # Keep snd-usb-audio from beeing loaded as first soundcard
> > options snd-usb-audio index=-2
> > # Prevent abnormal drivers from grabbing index 0
> > options bt87x index=-2
> > options cx88_alsa index=-2
> > options snd-atiixp-modem index=-2
> > options snd-intel8x0m index=-2
> > options snd-via82xx-modem index=-2
> 
> See above.

That's default Debian stuff for some modules that should never be loaded at 
index 0. It doesn't interfere since I have none of the corresponding hardware 
(even if I had, I still don't want my soundcard to load at index 0 anyway).

> 
> Also, I have the following lines at the end:
> 
> # Set this to the correct number of cards.
> options snd cards_limit=4

mine is at the top with limit=3, because I have 3 soundcards (loopback, Intel 
HDA and HDMI).

> > $ cat $HOME/.asoundrc
> > #------------------------------------------------------
> > # hardware 0,0 : used for ALSA playback
> > pcm.loophw00 {
> > 
> >   type hw
> >   card Loopback
> >   device 0
> >   subdevice 0
> >   format S32_LE
> >   rate 48000
> > 
> > }
> 
> I don't have that part
> [...]

Ok I edited my .asoundrc following your suggestions but nothing changed. The 
problem is that when jackd starts, it grabs the soundcard and other programs 
coming after it find the soundcard locked:

$ alsa_out -j ploop -dploop -q 1 &
$ alsa_in -j cloop -dcloop -q 1 &
$ ps ax | grep jack
10569 ?        SLsl   0:00 /usr/bin/jackd -T -ndefault -T -d alsa

$ aplay /usr/share/sounds/alsa/Front_Center.wav 
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
aplay: main:722: audio open error: Device or resource busy

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