Osc 1 Pwm Fader - Behringer DEEPMIND 12 User Manual

53 DeepMind 12 User Manual
The fader position, current value and stored value for the OSC 1 PITCH MOD fader
is shown on the PROG screen. There is also a visualization of the modulation as
shown below. The arrows indicate the polarity of the modulation..
Note: for ENVELOPE sources the arrow will only point in the UP direction
indicating that the modulation will be positive from the base pitch.
Note: for Uni-polar LFO sources the arrow will only point in the UP direction
indicating that the modulation will be positive from the base pitch.
The default source for the pitch modulation is LFO1. For more information on
selecting the OSC 1 pitch modulation source please consult the section later in
this document.

8.3.2 OSC 1 PWM FADER

The OSC 1 PWM fader controls the PULSE WIDTH of the OSC 1 SQUARE waveform,
or the depth of PULSE WIDTH MODULATION (PWM) applied to the OSC1 SQUARE
waveform. The PWM SOURCE is selected in the OSC EDIT page described later
in this section. When the PWM source is set to MANUAL, the fader controls the
PULSE WIDTH. When the PWM source is set to any of modulation sources the
fader controls the depth of PULSE WIDTH MODULATION.
PWM adds harmonic structure to the sound and is often used to create a phasing/
movement eff ect, or used when creating string type sounds and sonic drones.
The pulse wave (aka rectangle wave) is often described as more"narrow
sounding" than a fully symmetrical square wave. As the pulse width modulation
is increased the "thinner" or "more hollow" the sound will become. Very high
values of PWM played at very low frequencies will start to sound like clicks, pops
or thumps.
As you increase the PULSE WIDTH the ratio of the positive cycle to the negative
cycle (also jointly known as duty cycle) will increase. The PULSE WIDTH
MODULATION does not aff ect the SAWTOOTH waveform.
PULSE WIDTH MODULATION
50%
75%
99%
The OSC 1 PWM range is from 50.0% (symmetrical square-wave) to 99.0% (short
pulsewave). The default OSC 1 PWM setting is 50.0%.
With a PULSE wave, the harmonic content changes depending on the pulse
width. It is characterized by a lack of the nth harmonic series when the pulse
width is 1/n. The example below does not have 3rd, 6th, or 9th harmonics
because the pulse width is 1/3 (33%).