I appreciate your thoughts on this, Doug and Erich! I'm testing on a Beaglebone Black running Debian Stretch. I found a ridiculously simple solution to the input sharing issue, at least in terms of the availability of a signal to SoX. By changing SoX input from 'hw:1,0' to 'dsnoop:1,0' ALSA does not lock up the source. So, this runs: sox --buffer 1024 -r 48000 -c 2 -t alsa dsnoop:1,0 -t alsa plug:filter1 ladspa ACDf 21 1 0 240 0.707 0 0 ladspa ACDf 21 1 0 240 0.707 0 0 But unfortunately this does not, giving the attached result: sox -V3 -M \ “| sox -t alsa dsnoop:1,0 -p remix 1v1 ladspa ACDf 21 1 0 240 0.707 0 0 ladspa ACDf 21 1 0 240 0.707 0 0” \ “| sox -t alsa dsnoop:1,0 -p remix 1v1 ladspa ACDf 22 1 0 240 0.707 0 0 ladspa ACDf 22 1 0 240 0.707 0 0” \ “| sox -t alsa dsnoop:1,0 -p remix 2v1 ladspa ACDf 21 1 0 240 0.707 0 0 ladspa ACDf 21 1 0 240 0.707 0 0” \ “| sox -t alsa dsnoop:1,0 -p remix 2v1 ladspa ACDf 22 1 0 240 0.707 0 0 ladspa ACDf 22 1 0 240 0.707 0 0” \ -t alsa plug:testout4 remix -m 1,2 3,4 sox: SoX v14.4.1 sox FAIL sox: Not enough input filenames specified sox FAIL ladspa: usage: MODULE [PLUGIN] [ARGUMENT...] sox FAIL ladspa: usage: MODULE [PLUGIN] [ARGUMENT...] sox FAIL ladspa: usage: MODULE [PLUGIN] [ARGUMENT...] sox FAIL ladspa: usage: MODULE [PLUGIN] [ARGUMENT...] Doug, if we got as far as having unsynchronized signals, there are delay filters in the ACDf LADSPA filter set and also most crossover paths can be made (nearly) symmetrical anyway. :) TIA for any and all ideas! Frank -- View this message in context: http://sox.10957.n7.nabble.com/implementing-loudspeaker-crossovers-using-Sox-LADSPA-plugins-tp5464p5715.html Sent from the SoX mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ Sox-users mailing list Sox-users@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/sox-users
