I'm trying to understand snd-aloop and whether my experiences are of buggy software or I'm doing something wrong. # modprobe snd-aloop # echo "Layla3G,0,0" > /proc/asound/Loopback/timer_source For example; if I try the simplest action of playing some audio and recording it: $ aplay -D hw:Loopback,0,0 music-48k.wav $ arecord -D hw:Loopback,1,0 -f dat recorded.wav I get a 44 byte WAV header and a hang, until the processes exit after a few seconds with: aplay: pcm_write:2061: write error: Input/output error arecord: pcm_read:2153: read error: Input/output error Thinking that maybe the device 'timer source' needs to be rolling, I try "aplay" to hw:Layla3G,0,0 but this has no effect. Information in /proc "cable#0" shows things open but no buffer movement (btw. I deduce that the "size" here is bytes, not frames) Kernel is v5.6.6. There seems to be zero docs on Loopback in general, alsaloop and snd-aloop (am I correct?) so I can't be sure what the "expected" behaviour is. I do intend to use with alsaloop & dmix, but both of these seem to be introducing idiosynracies of their own making it hard to pin down where the problems are, so I started with this one. Should I expect the commands above to work? If not... why not? -- Mark _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
