via HOSHUYAMA on AH."Its schematic is already revealed in its instruction manual, however, it does not include component values. To get the schematic with component values, which is essential for us, I made one from the open information on the internet and some measurement of an SX-150. Actually, this small synth was designed by our Naoki Iwakami (AKA. "GAN" in this list). The design is unusual to save the cost, but very clever and unique!"
Hmmm...interesting VCF topology - reminds me of Casio's discrete VCFs (in DH100 and MT-400v/CT-410v), except they use FETs.
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