Feedback - Yamaha PLG150-DX Owner's Manual

Feedback

Each algorithm has a special feedback loop, programmed to a fixed location in the algorithm. With
feedback, a modulator's output is connected to its own input, so that it modulates itself. This can be
used to increase the harmonic content of the sound, making it more rich and complex. When set to a
high level, feedback can generate noise effects — making it useful for percussive voices, metallic
sounds, and distortion effects.
Some algorithms feature a feedback loop that takes in two or three operators as a group. One such
example is algorithm 4 shown below, in which the output of operator 4 is returned to the input of
operator 6, thus modulating the entire stack. This provides even greater possibilities for tonal varia-
tion and richness.
Algorithm 4
3
2
1
FM Tone Generation
6
5
Feedback loop
4
11