Operation Manual

6.35 LFO (Low Frequency Oscillator 99
6.35 LFO (Low Frequency Oscillator
The LFO module has no input and one output. The output is a periodic signal
with frequency varying between 0.1 and 35 Hertz depending on the setting of the
frequency knob. The oscillation of the two red LEDs on the front panel give an
indication of the output frequency. The wave shape is set by the wavetype switch.
Waveforms include triangle, square random and sine. The amplitude of the output
signal is ±1 Volt.
Typical Use
The LFO is often used to generate tremolo (amplitude modulation) as shown in
Figure 27 or vibrato (frequency modulation) as in Figure 28. Two LFO modules
with a Sample & Hold can be used to generate a random signal as illustrated in Figure 53 under
Sample & Hold module.
Figure 52: LFO used for tremolo.
Figure 53: LFO used for Vibrato and Pulse Width modulation.