ER-301/Accents/Aliasing Pulse

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Applications

  • Audio rate synthesis with PWM (pulse width modulation)
  • LFO with sync capabilities
  • Clocking

Description

This unit is a simple pulse wave oscillator with inputs for both exponential and linear FM, a pulse width control, and an internal VCA on its output. The linear FM supports thru-zero operation.

Video

Parameters

V/oct

Control Type Has Sub-chain? Sub-chain Parameters Fader Scale
Pitch yes transpose (-3600¢ to 3600¢) logarithmic ratio

This parameter is used to transpose the base frequency up or down according to an incoming modulation value that is V/oct calibrated (typically one of the inputs from the ABCD matrix). In other words,

where is the value of this parameter (which is in cents). For example, if the base frequency (f0) is equal to 55Hz and this V/oct parameter is set to 2400¢, then the resulting frequency will be 220Hz (i.e. 2400¢ = 2 octaves which is 4x).

f0

Control Type Has Sub-chain? Sub-chain Parameters Fader Scale
Gain/Bias yes gain (-10,000 to 10,000)

bias (10 octaves above and below 27.5Hz)

frequency in Hertz


This parameter sets the fundamental frequency that is subsequently transposed by the V/oct parameter. Modulating this parameter corresponds to (thru-zero) linear FM.

width

Control Type Has Sub-chain? Sub-chain Parameters Fader Scale
Gain/Bias yes gain(0 to 1)

bias (0 to 1)

linear

Sets the width of the pulse from 0-100%. Apply low frequency modulation to this control for PWM (pulse width modulation).

sync

Control Type Has Sub-chain? Sub-chain Parameters Behavior
Threshold yes threshold (-1 to 1) trigger


A trigger into this parameter will cause the oscillator to reset its phase accumulator to zero. This is equivalent to the hard-sync on many oscillators.

level

Control Type Has Sub-chain? Sub-chain Parameters Fader Scale
Gain/Bias yes gain (-10 to 10)

bias (-1 to 1)

linear gain


This parameter controls an internal bipolar linear VCA on the output of the unit. It behaves exactly the same as the level parameter of a Linear Bipolar VCA unit.