Roland VCF VCA 80017A and 5534A Dilemma
Is your Roland Juno 106, Roland MKS-30, Roland HS-60, Roland GR-700, or Roland MKS-7 not working properly and in need of a fix? Does it suffer from filter issues or hanging notes? VCF or VCA problems? If so, you need to read this.
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Analog Synthesizer Interfacing
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Vacuum Tube Biasing Demystified