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Access Music Virus Indigo Plug-in Guide46

To hear the filter envelope:

1 Click memory location 8, “Filter Envelope”

and press the Spacebar to begin playback.

2 During playback, watch the Attack, Decay,

Sustain, Time and Release controls and listen to

how the sound character changes.

Experiment with different Resonance and Env

Amt settings while playing your MIDI keyboard

controller.

For the Filter Envelope to have a significant ef-

fect, the filter should be at least partially closed

so that the envelope can open it.

Use the Envelope Polarity switch to invert the

polarity of the filter envelope of each filter for

some interesting effects.

Memory Locations 9 and 10 demonstrate how

different filter envelopes can radically change

the timbre of a patch.

To hear how filter envelopes affect timbre:

1 Click memory location 9, “Typical Filt

Envelope 1” and press the Spacebar to begin

playback.

This patch has a fast attack similar to synthesizer

bass patches heard on many recordings.

2 Click memory location 10, “Typical Filt Enve-

lope 2” and press the Spacebar to begin play-

back.

This patch has a soft attack that sweeps the fil-

ter. This is also a commonly used synthesizer ef-

fect.

These examples should give you an idea of the

sound shaping power of the Filter Envelope.

Tutorial 5: Using the LFOs

Virus Indigo has three separate low frequency

oscillators. These can be used to modulate the

oscillators, filters, and other parameters to pro-

duce vibrato, tremolo, wah-wah, and many

other effects.

LFO waveshapes include:

•sine

• triangle

• sawtooth

•square

• sample & hold (random)

• sample & glide (random with portamento)

• oscillator waveform number. This selects

one of the many different waveshapes (3-

64) produced by the main oscillators.

Each of these waveshapes produces a character-

istic type of modulation.

When routed to the oscillators, for example,

sine and triangle waveforms produce vibrato. A

square wave produces trills. A sawtooth wave

produces a falling pitch effect reminiscent of la-

ser gun-type sound effects.

To hear LFO pitch modulation:

1 Open the “Tutorial 5” 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 LFO to show the LFO page.

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