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Chapter 5: Virus Indigo Tutorials 49

By varying the range, clock speed and playback

mode of the Arpeggiator, you can create a vari-

ety of effects.

To hear the arpeggiator:

1 Click memory location 2, “Arpeggiator” and

press the Spacebar to begin playback.

2 At the upper left of the Virus Indigo plug-in,

click FX-1 to show the effects page.

3 During playback, watch the Mode, Clock, and

Oct Range controls and listen to how the arpeg-

giation changes.

Experiment with different Mode, Clock, and Oct

Range settings while playing your MIDI key-

board controller.

Select the Hold control and note how the arpeg-

giator continues to play the most recently held

notes even after you release the keys.

Arpeggiation is more dramatic with high-im-

pact, percussive sounds. Memory Location 3

demonstrates this.

To hear another example of arpeggiation:

1 Click memory location 3, “Arpeggiator.”

2 Change the patch by choosing Tutorial Sound >

Tutorial 6 Arpeggiate from the Librarian menu.

3 Press the Spacebar to begin playback.

This patch uses Unison mode to add weight to

the patch and give it a wide stereo spread.

Using the Vocoder

Vocoders are commonly used to make sounds

“talk” by filtering a waveform or other audio

source (the carrier signal) according to the ampli-

tude characteristics of a human voice (the mod-

ulator signal).

By merging the frequencies of the two different

audio signals together, the carrier takes on the

texture of the modulator.

The Vocoder Demo session demonstrates this

type of vocoding.

To open the Vocoder demo session:

1 Locate and open the “Vocoder Demo” session.

2 Record enable the Instrument track so that

you can play Virus Indigo using a MIDI key-

board controller.

3 At the upper left of the Virus Indigo plug-in,

click FX-2/Global to show the vocoder.

4 Click memory location 1, “Full Vocoder” and

press the Spacebar to begin playback.

Memory Location 2 demonstrates how the

Source Balance control determines the balance

of modulator and carrier signals.

To hear the carrier and modulator signals:

1 Click memory location 2, “Vocoder Balance”

and press the Spacebar to begin playback.

2 During playback, watch the Source Balance

and listen to the carrier and modulator signals.

Memory Location 3 demonstrates the various

Vocoder parameters and how they affect the

timbre and quality of vocoding.

The Arpeggiator can be synchronized to

MIDI Beat Clock. See “Synchronizing LFO

Clock to MIDI Beat Clock” on page 47.

To hear more examples of arpeggiation,

load one of the Arpeggiator presets with the

Librarian.

For best results, use the Vocoder on harmon-

ically rich material.

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