I was looking for a drum-machine, which I can interact with,
while playing an instrument like bass or guitar.
Nothing I found was really my thing, so I've mostly used what I
already had, together with an Arturia Beatstep 1
(hardware MIDI-sequencer). This isn't perfect, but near to what
I'm looking for.
The Beatstep is sending MIDI-notes to the RaspberryPi-samplerbox (https://www.samplerbox.org/),
which has a set of drum samples in my case.
The MIDI-Pedal is controlling the Beatstep via SysEx commands:
-PLAY and STOP should explain themselves
-TAP: Press twice or more for tap to tempo
-TMP+/-: Increase or decrease tempo by 10 BPM
-SEQ+/-: Jump the the next or previous pattern after current pattern
Everything is powered by a 5V 1A PSU, connected via USB on the
And, because it's USB-MIDI: Don't forget to connect everything on
the software side via ALSA-MIDI (aconnect).