Yamaha DX7 Instruction Manual download pdf (Page 14)

11. Pitch EG Demo 1

General Description:

This voice is designed to demonstrate obvious (and dramatic) use of the Pitch EG. The DX-7 has only one

envelope for pitch control. It affects all operators simultaneously, whether they be carriers or modulators.

There is no way to isolate the effects of the pitch envelope on any given operator, nor is there any way to

have more than one pitch envelope per voice.

Patch Information:

Op. 2 modulates Op. 1 (both at full output) with a slowly ascending and descending Pitch EG controlling

both simultaneously. A Level setting of “50” indicates normal pitch; numbers above “50” indicate a higher

pitch; numbers below “50” indicate a lower pitch. The amplitude EG for Op. 2 (the modulator) is set with

relatively slow rates so that changes in timbre accompany changes in pitch.

Exercises:

1. Try adjusting the shape of the Pitch EG by drastically changing the first two rates. If you are using

the Macintosh, simply "drag" the appropriate corners of the graphic display of the EG. (You may

need to "point and click" the mouse on one of the numerical settings of the pitch EG to bring the

graphic EG into the editing window.)

2. Make adjustment in the Level settings for the Pitch EG. Begin simply by altering the “non-50”

settings. Next start altering the levels set at “50”. Finally, try to make the Pitch EG change

directions more than two times by alternating levels (i.e. high-low-high-low, etc.)

-14- Basic FM Synthesis

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Yamaha DX7 Instruction Manual Page 14