Roland VCF VCA 80017A and 5534A Dilemma
Yamaha CS-80 Bulletin 18
Regarding the Combosynthasiser, when the Brilliance of Touch Response is at maximum, to avoid unusual Vibration of IC (iG00150) the following alterations are made..
Yamaha CS-80 Bulletin 46
In some cases, it has been found that there is a certain amount of reduction in the attenuation pitch in SUS 1 LONG in the CS-50, 60 and 80 component synthesizers.
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Yamaha CS-80 Bulletin 58
Changing the constants of resistors of Conversion Control IC (IG00151) to improve adjustment – work efficiency.
Yamaha CS80 Service Bulletin 96
In the CS-80 Polyphonic Synthesizer, the pitch of a low-frequency sound may fluctuate when keys of low- and high-pitched sounds are depressed simultaneously. If this happens, take the actions described below.