E-Mu Morpheus Instructions d'exploitation télécharger pdf (Page 49)

Chapter 4: Programming Basics 41

PROGRAMMING BASICS

If the key is released during the Hold (H) phase, the Release phase begins.

LOW FREQUENCY OSCILLATORS (LFOS)

A Low Frequency Oscillator is simply a wave which repeats at a slow

rate. The Planet Phatt has two multi-wave LFOs for each of its 32

channels. The LFO waveforms are: Triangle, Sine, Square, Sawtooth,

and Random, which is a random “sample and hold” type of wave.

Other LFO waves are “Synced” which means that their rates will

follow the tempo as set in Beats mode.

By examining the diagram of the LFO waveforms, you can see how the

LFO will affect a modulation destination. Suppose we are modulating

the pitch of an instrument. The sine wave looks smooth, and will

smoothly change the pitch. The square wave changes abruptly, and

will abruptly change the pitch from one pitch to another. The

sawtooth wave smoothly decreases, then abruptly changes back up.

The sound’s pitch will follow the same course. Controlling the pitch

of an instrument is an easy way to hear the effects of the LFO waves.

level

key

down

key

released

AHR

time

Triangle

Square

Sine

Sawtooth

Random

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E-Mu Morpheus Instructions d'exploitation Page 49