Low Frequency Oscillators - E-Mu Vintage Keys Operation Manual

level
key
down
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 Vintage Keys 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.
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.
Triangle
Sine
Square
time
A H R
key
released
Sawtooth
Random
Chapter 4: Programming Basics
PROGRAMMING BASICS
31