Modulation, Stereo flange, Mod freq. range: 0.1 ~ 40.0 hz – Yamaha SPX90 II User Manual
Page 13: Mod depth. range: 0 ~ 100, Mod delay time. range: 0.1-100.0 msec, F.b. gain. range: 0 - 99, Mod freq. range: 0.1 - 40.0 hz, Delay modulation depth. range: 0 - 100, Amplitude modulation depth. range: 0 - 100
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