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Andreas Schneider wasn't doing the 'Superbooth' this year... but he had a similarly hectic stand at Messe under the Alex4 banner, populated with interesting modular & synthy goodies, and lots of loud beeps and pops.
Rebel Technology were showing their algorithm-based modules (such as 'Stoichea', the Euclidian Sequencer), a cool Kickstarter funded open-source effects pedal platform, and some new prototypes.
Martin Klang wore the mic and gave us the info.
Eurorack module puts General MIDI sound set under creative CV control