Frequency Modulation (FM) Synthesis
Other FM Configurations
Other common FM structures include ``multiple modulator FM'' and ``feedback FM''.
Several STK instruments (
) use two summed FM pairs, though in all cases one of the modulators feeds back on itself (and is not a sinusoid).
STK instrument sums 4 oscillators which are modulated by an LFO to simulate vibrato. Again, one of the oscillators feeds back on itself (and is not a sinusoid).
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Gary P. Scavone