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. this wave can be applied to control the frequency in
cents or the amplitude of the operators in dB. menu 4 and 5 allow you to control the LFO
parameters of the DAFM synth arcade YM2151. you have to configure both menus to get
the LFO effect
with the left knob of 4.1, you control the LFO frequency globally for all four operators at
once. the frequency modulation sensitivity in cents can be adjusted with the right knob of
4.1. this affects the depth of modulation applied to the operators' frequency by the LFO.
the left knob of 4.2 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.
8
dafm synth
arcade ym2151
