via this auction
"Roland factorymade 80017A VCF/VCA ICs installed to keep sounds original
The tech who worked for this JUNO-106 is a collaborator of this first acetone soak project, who supplied a bunch of sample ICs and some technical info either. It was 9 years ago. [posted here]
After more investigation we realized just uncoating won't bring perfectness but some more work required. Please don't ask how but understand that top class restaurants won't disclose their recipes.
Now the error rate is as low as other standard ICs in this synth."
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