Archive of the former Yahoo!Groups mailing list: Yamaha CS80

As to the VCF adjustment procedure reported by Yamaha for the CS-80, I have some considerations / questions for those who already faced such a task.

1) In HPF cutoff freq & resonance adj: I guess the waveform indicated in the specifications of complete VCF alignment procedure is wrong! IMHO the right one should be the one drawn in the chapter "specifications of VCF alignment when only some of VCF ICs are changed", in that a pure sinusoidal wave can only be obtained when adjusting the LPF. Am I wrong?

2) As regards the diagram amplitude, the values of 4.3 ± 1Vpp for HPF and 2.2 ± 1Vpp, respectively, are reported. My question: was it meant to be really ± 1Vpp or ± .1Vpp ?

Any help appreciated: I think it is important for all list members who want to afford such a problem!

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