Using The Waveform Generator (Lfo); Amplitude Adjustment - Wave Idea Bitstream PRO Owner's Manual

Using the Waveform Generator (LFO)

LFO (Low Frequency Oscillator) allows to generate sinusoidal, square, or triangle waveforms. With 3
additional potentiometers, Frequency, Offset and Amplitude of the generated waveform are adjustable
in real-time. The generated waveform can be considered as a potentiometer, then inserted in any user
defined MIDI string.
This feature of BitStream Pro allows to automate a control without modifying it by hand
A LED associated to the LFO is used to verify if the LFO is turned ON or OFF.
From ROM V1.2 and higher, the LFO can be synchronized to an external MIDI clock

Amplitude Adjustment

A potentiometer is dedicated to the amplitude of the generated wave. It allows to modify this amplitude
from 0 to 63, and can be tweaked dynamically, in order to produce real-time MIDI effects.
The following figure shows how the amplitude adjustment is performed on a sinusoidal waveform,
when Offset value is fixed to its middle value, 64.
127
0<Amplitude<64
Offset = 64
0
When amplitude + Offset is higher than 127 (The maximum MIDI value over 7 bits), then the
generated wave is digitally clipped to its maximum value 127. On the other hand, when amplitude +
Offset is lower than 0 (The minimum MIDI value over 7 bits), then the generated wave is digitally
clipped to its minimum value 0.
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