XERXES INSTRUCTION MANUAL
REV 0.7
Page
6
of
21
NOTE:
Turning on Ring Mod for both oscillators at the same time, or when combined
with PWM or PAM settings, can produce harsh distortion-like noise that may not track
the keyboard very well from note to note. Use the Pulse Width knobs to fine tune the
resulting sound in this case and test each note before using.
PULSE WIDTH
Adjusts the pulse width from 0% to 100% of the currently selected Pulse waveform
only. It has no function for other waveforms. At 50% the waveform is a square wave
with only odd harmonics, with more harmonic content being added towards the
extremes. Pulse width can be controlled automatically at audio rates from the other
oscillator by either the Pulse Width Cross-Modulation (PWM) setting, or with the Low
Frequency Oscillator (LFO) which can be used to change the timbre slowly over time.
NOTE:
When PWM is not active, there is no sound at either extreme of the knob
setting, at 0% and 100%.
VOLUME
Adjusts the output volume of
the oscillator before it’s mixed with the other oscillator
and sent to the filter circuit.
It’s recommended that the volume is used in the middle
setting (4-6) unless the patch itself has lower than normal volume. Using it at the
maximum 10 setting may produce distortion at the output on some modulation
settings, especially when using chords.
MULTIMODE FILTER
The filter controls the harmonic content of the raw audio output from the oscillators by changing the
frequency ranges of the audio signal. The filter contains four modes that define which frequency bands
OSC 1
SAWTOOTH
RING MOD
OSC 2
SQUARE
OSCILLATOR 1 WAVEFORM
RING MODULATED BY OSCILLATOR 2 AMPLITUDE
