Pethu has released Hahaha CS01 v1.10, a homage to Yamaha's CS01, released in 1982 as an entry-level, highly portable synth. Two versions of Hahaha CS01 are available - Original grey CS01 with 12dB filter and a black CS01II with 24dB filter.
- One LFO
- One VCF
- One VCA
- One EG
Hahaha CS01 is free and is available for Windows as a VSTi.