menu 4. low frequency
oscillator LFO
the low-frequency oscillator (LFO) in FM synthesis generates a wave that oscillates at a
frequency below the audible range, typically less than 20 Hz. this wave can be applied to
control the frequency in cents or the amplitude of the operators in dB. menu 4 allows you
to control the LFO parameters of the DAFM synth genesis YM2612 / YM3438.
with the left knob of 4.1, you can turn the LFO on or off for all four operators at once. the
right knob controls the LFO frequency globally for all operators. the frequency
modulation sensitivity in cents can be adjusted with the right knob of 4.2. this affects the
depth of modulation applied to the operators' frequency by the LFO.
the left knob of 4.3 turns on or off the amplitude modulation for each individual operator.
the right knob adjusts the global sensitivity in dB for all operators. with amplitude
modulation, the LFO affects the amplitude or loudness of the operator's signal instead of
the frequency. by experimenting with the LFO settings, in summary by adjusting the
amplitude modulation sensitivity in menu 4, you can achieve tremolo, while adjusting the
frequency modulation sensitivity can give you vibrato.
dafm synth
genesis ym2612 and ym3438
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