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Chapter 5: Virus Indigo Tutorials 39

Changing Square Wave Pulse Width

You can modify a square wave’s shape and

sound character by changing its pulse width.

The narrower the pulse width, the more nasal

the sound.

Memory Location 4 demonstrates this.

To change pulse width:

1 Reset the patch to its original state by choos-

ing Tutorial Sounds > Tutorial 1 Sound from the

Librarian menu.

2 Click memory location 4, “Change Pulse

Width” and press the Spacebar to begin play-

back.

3 During playback, watch the PW control and

listen to how the square wave’s sound character

changes.

As you can see, you can produce vastly different

sounds using just the Wave Select, Shape, and

PW controls—and you haven’t even used the fil-

ters yet.

Next, you’ll use oscillator 2 to further enhance

your tone generation options.

Tutorial 2: Oscillator 2

You can increase the variety and complexity of

sounds by combining oscillator 2 or 3 with

oscillator 1. Oscillator 2 actually provides a

greater variety of waveshaping controls, several

of which are covered here.

To hear oscillator 1:

1 Open the “Tutorial 2” 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 Osc to show the oscillator page.

4 Play a note.

At this point, only oscillator 1 is audible because

the Osc 1/2 Bal control in the Mixer section is

set to –64.

Setting Osc 1/2 Bal to 0 will add an equal

amount of oscillator 2 to the mix.

Slightly detuning oscillator 2 with the Detune

control will then enhance the thickness and an-

imation of the sound.

Memory Location 1 demonstrates this.

To use oscillator 2:

1 Click memory location 1, “Osc Bal + Detune”

and press the Spacebar to begin playback.

2 During playback, watch the Osc Bal and De-

tune controls and listen to how the sound char-

acter changes.

Tuning to a Semitone Interval

You can take detuning a step farther and tune

oscillator 2 to a harmonic interval using the

Semitone control for some interesting tonal ef-

fects.

Memory Location 2 demonstrates this.

To tune oscillator 2 to an interval:

1 Reset the patch to its original state by choos-

ing Tutorial Sounds > Tutorial 2 Sound from the

Librarian menu.

2 Click memory location 2, “Semitone Detune”

and press the Spacebar to begin playback.

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