EMU Ultra Proteus User Manual download pdf (Page 12)

Fundamentals

12 EMU Systems, Inc.

This is how the rate/level envelopes work: When a key is pressed, the envelope

starts from zero and moves toward the Attack 1 Level at the Attack 1 Rate. As

soon as it reaches this first stage, it immediately begins the Attack 2 phase and

moves toward the Attack 2 level at the Attack 2 rate. As long as the key is still

held, the envelope continues on through the Decay 1 and Decay 2 stages. If the

key is still held when the envelope reaches the end of Decay 2, it simply stops

and waits for you to release the key. When you release the key, the envelope

continues through its Release 1 and Release 2 stages, returning to zero at the

end of the Release 2 stage. The rate/level envelopes give maximum flexibility to

program both complex and simple envelopes.

The envelopes and other controllers are connected to the sound processing

blocks using software Cords. Cords have a built-in bipolar amount control.

(No, they’re not schizophrenic!) The amount goes from -100 to +100. If the

amount is negative, the control signal is inverted. The Cords provide

tremendous flexibility because they allow almost any possible connection

between the various control and processing modules.

So there you have it! There are three basic sound processing modules:

Oscillator, Filter and Amplifier. The Envelope Generators and other

controllers are connected to the processing modules using Cords, which have a

built-in amount control.

An oscillator can be ANY sound. Samples are imported or recorded, then

shaped using the various filter types and the amplifier using the envelopes and

other controls. The possibilities are truly staggering!

In creating a synthesizer sound you become an instrument builder. Your job as

builder is to combine the various elements together and add various types of

control so that the instrument responds in a musically satisfying way. So let’s

continue now and build a preset completely from scratch.

Amp

LFO

(x2)

MIDI

Controls

Envelope

Gen

(x3)

Other

Key #

Velocity

Gate

Retrigger

Pitch

Loop

Frequency Q

Vol

Pan

Chorus

Glide

Start Offset

Voice

- 36 Cords -

Filter

Controllers

Function

Gen

(x3)

Sample

(Oscillator)

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 151 152

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EMU Ultra Proteus User Manual Page 12

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