video upload by Vintage Echo Room
via this auction
"Crumar DS2 Vintage Synthesizer, fully functional both in the monophonic and in the polyphonic part.
Overhauled in 2021, they were replaced:
- all electrolytic capacitors with new quality ones
- all tantalum capacictors
- all the CMOS ICs with new ones (in the digital part the bypass capacitors have been added for the CMOS since they were missing in the design)
- the majority of the op-amps"
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