Chris from @BOOelectric treats us to some quality time with the Yamaha CS01 - a much loved battery powered monosynth that was a first synth for many budding synthesists.
Chris has modified one of his two CS synths, adding a resonance modification to the 2 Pole Low pass filter.
Its not pleasant, but it works....
The CS01 was also recently immortalized in software by Babyaudio.com as the BA-01.
Which incidentally we have a 15% off code - use ST2023 at checkout
And so much more
Monster Poly actually portable
Sampling, live FX and performance
Up to 32 ins and 26 Outs with ADAT