Yamaha Electone EL-87, Owner'S Manual

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(5) General Guidelines for Editing Operators
Before you edit a voice, always check its algorithm to see which
Operators function as carriers and which as modulators. Then select
each Operator in turn and edit its parameters. The Output Level and
envelope parameters function differently depending on whether they
belong to a carrier or a modulator. The following list illustrates the
relationships between the Operators and parameters:
1 To change the overall volume: Change 1 of the carrier. Change 7 of the AWM.
2 To change the overall tone: Change 1 of the modulator. Change 8 or 9 of the AWM.
3 To change how the volume varies over time: Change 2, 3 or 5 of the carrier.
4 To change how the tone varies over time: Change 2, 3 or 5 of the modulator.
5 To raise the volume: Raise 1 of the carrier. Raise 7 of the AWM.
6 To lower the volume: Lower 1 of the carrier. Lower 7 of the AWM.
7 To make the sound brighter: Raise 1 of the modulator.
8 To make the sound softer: Lower 1 of the modulator.
9 To get faster attack: Raise 2 of the carrier and modulator.
10 To get slower attack: Lower 2 of the carrier and modulator.
11 To reduce the sound rapidly: Raise 3 and 5 of the carrier and modulator.
12 To reduce the sound slowly: Lower 3 and 5 of the carrier and modulator.
13 To get no or shorter sustain: Raise 6 of the carrier and modulator.
14 To get longer sustain: Lower 6 of the carrier and modulator.
15 To change the timbre rapidly: Raise 2 of the modulator.
16 To change the timbre slowly: Lower 2 of the modulator.
17 To make the AWM sound brighter: Raise 8 of the AWM.
18 To make the AWM sound darker: Lower 8 of the AWM.
19 To get more pronounced AWM sound: Raise 9 of the AWM.
20 To get softer AWM sound: Lower 9 of the AWM.