Yamaha PLG150-VL Owner's Manual download pdf (Page 10)

FM Tone Generation

Algorithms

Although two operators can be combined in only two different ways, six operators can be conﬁgured

in a wide variety of combinations. These combinations are called “algorithms.” Just as on the origi-

nal DX7, the PLG150-DX features 32 different algorithms, giving you different levels of harmonic

complexity for various applications.

Since the function of any given operator depends on the particular algorithm, you should check a

voice’s algorithm carefully while editing the voice. For a chart showing all 32 algorithms, see page

34. Each operator in the algorithm is numbered to distinguish it from the others in editing.

Let’s take a look at algorithm 28 as an example. The various operators function as follows:

Operator 1.............Carrier; is modulated by Operator 2, and outputs the resulting sound.

Operator 2.............Modulator; modulates Operator 1.

Operator 3.............Carrier; is modulated by Operator 4, and outputs the resulting sound.

Operator 4.............Modulator; modulates Operator 3.

Operator 5.............Modulator; modulates itself with a feedback loop, and modulates

Operator 4.

Operator 6.............Carrier; outputs a sine wave.

2 4

1 3 6

Algorithm 28

Feedback loop

(see next section)

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 67 68

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Yamaha PLG150-VL Owner's Manual Page 10