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Square
Triangle
Vibrato
Trill
Figure 10-1. Triangle vs. Square waves
The musical effect is approximately as shown in Figure 10-2.
Triangle Wave Vibrato
Square Wave Vibrato
Figure 10-2. Musical Effect.
Use INCR and DECR to alternate between .SQUARE and .TRIANGLE.
Depth
When the display shows DEPTH, you can select the depth and mode of the oscillation. Depth is the amount that the pitch
will vary, in cents. Mode is how this variation will occur in relation to the nominal pitch. above it (+), below it (-), or
varying both above and below (±, -/+). When you choose both, mode selects which wave the oscillation starts: ± means the
oscillation starts positive and goes negative, -/+ means the oscillation starts negative and goes positive. Figure 10-3
illustrates modes of selection for a triangle wave.
Figure 10-3. Triangle Wave Modes
The depth can be selected to be between 0 and 3600C. Enter a value in cents using the numeric button-pad and press ENTR,
or use INCR and DECR to change the value by 10 C increments. Note that if the depth is selected to be 0, no vibrato effect
will be audible.
Select the desired mode by pressing - to step through each of the four choices: +, -, ±, -/+.
Rate
When the display shows .RATE, the frequency at which the vibrato occurs can be selected. A low frequency results in a
"slow" vibrato effect, while a high frequency results in a "fast" vibrato effect.
The frequency can be adjusted from 0 to 49.9Hz. Enter a value directly using the numeric button-pad and press ENTR, or
use INCR and DECR to change the value by 0.1 Hz increments. Note that if 0Hz is selected, no vibrato effect will be
audible.
10-2
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