Yamaha PLG150AN Manuel du propriétaire télécharger pdf (Page 10)

Analog Physical Modeling Synthesis and the PLG150-AN Tone Generator

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FM uses the wave of one oscillator (called the “modulator”) to periodically change the pitch or fre-

quency of another oscillator (called the “carrier”).

The FM generated sound is output by the carrier, and the type and amount of harmonics that are added

to the sound differs depending on the ratio of the modulator and carrier frequencies.

On the PLG150-AN, the following can be used as the modulator: VCO 2, LFO, and each EG. The

carrier is ﬁxed to VCO 1.

Noise, Ring Modulator and Feedback

In addition to the VCO 1 and VCO 2 oscillators, the PLG150-AN includes a Noise oscillator, plus

Ring Modulator and Feedback controls. The levels of these ﬁve sound sources can be freely mixed,

giving you a wide range of sonic possibilities and comprehensive sound shaping control.

Avoid making drastic changes to Feedback, or setting the Feedback level to values at or near

the maximum. Doing so could damage your speakers (and your ears!). If you hear any strange

or unusual vibrations in your speakers as you are adjusting the Feedback level, immediately

turn Feedback down.

Adds harmonics to

the sound, due to

Oscillator Sync.

A different sound can

be layered, completely

independent of the

oscillator sync output

of VCO 1.

Oscillator Sync

Slave

oscillator

Determines

the timbre or tone.

Determines

the pitch.

Master

oscillator

Adds harmonics

to the sound,

due to Oscillator

Sync.

Output of the

basic sound.

Slave oscillator.

Determines the timbre

or tone.

Oscillator Sync

Master oscillator.

(This determines the pitch.)

VCO1

VCO2

VCO1

Using Oscillator Sync to lock VCO 1 to VCO2

This method is the same as on conventional analog

synthesizers. The sound quality can be changed by

giving VCO 1 and VCO 2 different pitches.

Using Oscillator Sync within VCO 1

This method is unique to the PLG150-AN. Since

VCO 1 and VCO 2 are independent, you can still use

Oscillator Sync to get more harmonics, yet layer VCO

1 and VCO 2 to produce sound of even greater

complexity and richness.

VCO2

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 76 77

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Yamaha PLG150AN Manuel du propriétaire Page 10

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