On Fri, 2007-02-02 at 17:37 -0500, Paul Davis wrote: > On Fri, 2007-02-02 at 17:32 -0500, Matt Price wrote: > > > playing tunes. would be nice not to have to start and stop jack every > > time I want to use amarok... but that's more of a wishlist item really. > > thanks again, > > amarok has an experimental gstreamer output engine. gstreamer has a > properly written JACK audio sink. its only a matter of time and > energy ... > paul and others, haven't gotten amarok working with gstreamer, but I did find out what most folks on the list doubtless know, that one can set alsa to actually play through jack using the jack plug-in for alsa. for me this is an adequate workaround and I am not having the snags that other people often complain of, at least not with audio apps -- vlc and mplayer freeze pretty bad, though totem seems to be working ok. I did htis on ubuntu, where the jack plugin is not enabled by default, so I had to ocmpile my own libasound2-plugins package. steps: sudo apt-get build-dep libasound2-plugins sudo apt-get source libasound2-plugins cd libasound2-plugins-xxx/ (uncomment jack-related lines in debian-rules) fakeroot debian/rules binary sudo dpkg -i ../libasound2-plugins-xxxxx.deb To get tthe jack plug in working I followed the instructions on the alsa wiki (http://www.alsa-project.org/alsa-doc/doc-php/asoundrc.php#jackplug and somewhere I lost track of), and created a .asoundrc : pcm.!default { type plug slave { pcm "jack" } } pcm.jack { type jack playback_ports { 0 alsa_pcm:playback_1 1 alsa_pcm:playback_2 } capture_ports { 0 alsa_pcm:capture_1 1 alsa_pcm:capture_2 } } It's great not to have to quit amarok just to use ardour -- this is good for me because I may want to quickly run through some music to listen to it for background, and amarok is where my music is actually ORGANIZED. It would be nice to be able to specify the alsa plugin at the command line for these apps (is there some kind of an alsa wrapper on the lines of aoss that can supercede the setting in .asoundrc ? that would be great). Failing a better way, I created little wrapper scripts for vlc and jack: vlcw: ~$ cat /usr/local/scripts/vlcw #!/bin/bash ln -s -f ~/.asoundrc-direct ~/.asoundrc killall jackd vlc $1 jackw: ~$ cat /usr/local/scripts/jackw #!/bin/bash ln -s -f ~/.asoundrc-jack ~/.asoundrc /usr/bin/jackd -d alsa -dhw:0 -r 44100 -n3 .asound-direct is an empty file .asound-jack is the file I quoted above. so far so good! If I happen on an improvement (e.g. a working jack sink in gstreamer, and a working gstreamer sink in amarok, vlc, mplayer) I will let y'all know. and comments welcome of course. m > -- Matt Price History Dept University of Toronto matt.price@xxxxxxxxxxx
Attachment:
signature.asc
Description: This is a digitally signed message part
