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Live Effects

Software configuration and performance of the UCA202 + Beaglebone Black

The Beaglebone Black comes out of the box with a completely functional Debian installation. I used apt-get to install ecasound and some ladspa plugins and I was off and running. I found that with a delay ladspa plug-in I could run with a buffer size of 128, here’s the ecasound command line: ecasound -b:128 -i alsahw,1,0 -o alsahw,1,0 -el:tap_stereo_echo,300,70,0,0,0,0,0 That’s a 300 ms delay with a lot of feedback. I measured the round trip latency at 15.4 milliseconds, which is pretty… Read More »Software configuration and performance of the UCA202 + Beaglebone Black

Hardware for Live Effects

I mounted everything in a small equipment case: The Beaglebone Black, UCA202, and a powered USB hub are mounted to the top of the case using industrial strength velcro. To mount the mixer I removed the rubber feet and the drilled holes in the bottom of the case and used the existing stand mount holes on the mixer.

Architecture for Live Effects

I already had a Mackie 0402VLZ4 mixer and a Beaglebone Black, so the only thing I needed was a way to get audio in and out of the BBB. The cheapest option was the Behringer UCA0202 which can be had for about $30. The audio from the microphone goes into channel 1 of the mixer which is panned hard left, then from the left output of the mixer into the audio interface. The audio interface output then goes back into… Read More »Architecture for Live Effects