On Tue, Jan 11, 2011 at 09:40:14AM +0100, Lorenzo Sutton wrote: > Hi, > > Ken Restivo wrote: >> I'm trying to figure out a way to play a simple loop from the command line. It doesn't need to be synchronized with anything (our drummer will be talking over it). > If you have mplayer with jack support you could do something like this: > > mplayer -ao jack loopfile.wav -loop 0 > > (-loop 0 means forever) That leaves a 1-second gap between plays, which doesn't exactly work for a loop. -ken ------------ >> I found this archive: >> >> http://comments.gmane.org/gmane.comp.audio.ecasound.general/3843 >> >> But there seems to be no "audioloop" in ecasound (I have 2.4.6.1-2 ). >> >> The man page I have on my system mentions "-tl", so I tried that, and it zombified jack (not good). >> >> Here is what I tried; >> >> $ ecasound -f:f32_le,2,48000 -t:3600 -a:1 -i:audioloop,johnloop48.wav -a:all -o jack_auto >> does nothing, just tells me three tims that it is using realtime-scheduling: >> - [ Engine init - Driver start ] >> (eca-engine) Using realtime-scheduling (SCHED_FIFO:50). >> (eca-engine) Using realtime-scheduling (SCHED_FIFO:50). >> (eca-engine) Using realtime-scheduling (SCHED_FIFO:50). >> >> Hmm. Goole says try "notransport". So I do. >> >> $ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1 -i:audioloop,johnloop48.wav -a:all -o jack_auto >> does nothing, just goes: >> - [ Engine init - Driver start ] >> (eca-engine) Using realtime-scheduling (SCHED_FIFO:50). >> and then hangs, but at least that tells me only once that it's realtime-scheduling >> >> OK, how about doing what the docs say? >> >> $ ecasound -f:f32_le,2,48000 -G:jack,ecasound,notransport -tl -a:1 -i:johnloop48.wav -a:all -o jack_auto >> plays the loop once, then zombifies >> (eca-engine) Using realtime-scheduling (SCHED_FIFO:50). >> zombified - calling shutdown handler >> (eca-engine) WARNING: Engine has raised an error! Possible causes: connection >> ... lost to system services, unable to adapt to changes in operating environment, etc. >> - [ Controller/Batch processing finished (-3) ] -------------------------------- >> ecasound: Warning! Errors detected during processing. >> (eca-control-objects) Disconnecting chainsetup: "command-line-setup". >> >> At least I got sound out of it though. >> >> Are there any other command-line tools I could use to loop a wav file, possibly simpler and less weird than ecasound? >> >> I guess I could write one, just read the bytes out of a wav file in a loop, and dump it into the jack process callback, wouldn't be too hard. But if something already exists, then I'd rather use that. >> >> Thanks! >> >> -ken >> _______________________________________________ >> Linux-audio-user mailing list >> Linux-audio-user@xxxxxxxxxxxxxxxxxxxx >> http://lists.linuxaudio.org/listinfo/linux-audio-user >> > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/listinfo/linux-audio-user _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
