Curiosity got the better of me and I ran a couple more tests. Conclusions: 1) "-t alsa hw:0,0" works fine for 4 channel output - no ALSA plug needed (though it doesn't hurt). 2) Adding 'delay' to each process seems seamless. How much delay? Increments of 8192 samples sound darn close... Note that very little competition for CPU is anticipated because the Beaglebone Black is a dedicated music player. Question: How would one precisely find the size of the delay added by each of the first 3 SoX filter processes? What is playing now: chrt -f 45 sox -M \ '| sox -t alsa dsnoop:1,0 -p remix 1v1 ladspa ACDf 22 1 0 640 0.707 0 0 delay 24576s' \ '| sox -t alsa dsnoop:1,0 -p remix 1v1 ladspa ACDf 21 1 0 640 0.707 0 0 delay 16384s' \ '| sox -t alsa dsnoop:1,0 -p remix 2v1 ladspa ACDf 22 1 0 640 0.707 0 0 delay 8192s' \ '| sox -t alsa dsnoop:1,0 -p remix 2v1 ladspa ACDf 21 1 0 640 0.707 0 0' \ -t alsa hw:0,0 'top' for the above command: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 709 root -46 0 8752 5040 4072 S 3.6 1.0 0:43.95 sox 711 root -46 0 8784 4880 3880 S 3.6 1.0 0:47.52 sox 713 root -46 0 8816 4980 3948 S 3.6 1.0 0:46.96 sox 707 root -46 0 8624 4864 3948 S 3.3 1.0 0:39.44 sox 705 root -46 0 7396 3840 3120 S 3.0 0.8 0:34.05 sox -- View this message in context: http://sox.10957.n7.nabble.com/implementing-loudspeaker-crossovers-using-Sox-LADSPA-plugins-tp5464p5722.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
