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PITTSBURGH MODULAR GENERATOR

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Quick Overview

Size: 10hp
Depth: 35mm
Power Usage: 30mA

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$239.00
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Details

(Dual Oscillator FM Monster)

A dual oscillator built around two triangle core, wide range, periodic waveform generators. As a multipurpose signal generator, it can provide the basis of a wide range of complex sounds ideal for tuned percussion/noise, abrasive amplitude, frequency and timbral modulation. Tones, drones, textures, and  drums to atonal, nintendo zipper/fart noises. This module was made for FM madness.

Size: 10hp
Depth: 35mm
Power Usage: 30mA

 

Generator Controls Are Divided Into 5 Rows

GEN1 - Control Set For Generator 1 (Oscillator 1)
 
EXP - An exponential CV input to control the rate of Generator 1. Although it is an exponential response, the Generator does not track 1 volt per octave and is not temperature compensated.
 
3 WAY RANGE SWITCH - a coarse adjustment for the Generator 1 frequency. Left = Low, Center = High, Right = Mid
 
RANGE POT - The fine adjustment for Generator 1 frequency.
 
EXTERNAL - FM modulation Input
 
INPUT ATTENUVERTER for the CV input. Pot zeros out at 12 o'clock. 
 
DESTINATION SWITCH - Determines which Generator (1 or 2) is modulated. Up modulates Generator 1, down modulates Generator 2. 
 
EXTERNAL INPUT - Accepts CV and audio rate signals as a modulation source.
 
GEN2 - Control Set For Generator 2 (Oscillator 2)

 

*Generator 2 is exactly the same as Generator 1 EXCEPT... Generator 2 is FM'd internally by the Generator 1 Index Out, which means the amount of internal FM of Generator 2 is controlled by the Index Pot and/or Index CV input. 
 
EXP - An exponential CV input to control the rate of Generator 2. Although it is an exponential response, the Generator does not track 1 volt per octave and is not temperature compensated.
 
3 WAY RANGE SWITCH - a coarse adjustment for the Generator 2 frequency. Left = Low, Center = High, Right = Mid
 
RANGE POT - The fine adjustment for Generator 2 frequency.
 
SHAPE - Generator 1 & 2 Waveform Controls
 
SHAPE POT - Controls the waveforms of both Generator 1 and Generator 2. Turned full left, Generator 1 is a square wave and Generator 2 is a triangle wave. Turned full right, Generator 1 is a triangle wave and Generator 2 is a square wave 
 
1 - Output for Generator 1 (Pre Index VCA) 
 
2 - Output for Generator 2
 
INDEX (Generator 1 VCA Output Control)
 
CV INPUT for the index VCA 
 
OUT - Post Index VCA Generator 1 output.
 
INDEX POT - Gain control for Generator 1 Index VCA. The Index Pot is not an attenuator for the Index CV input. Full left is 100% gain. Full right is 0% gain. Turn the Index pot full right to get the full effect of the CV input on the signal. Turn the Index Pot full left to get 100% regardless of CV input.

 

Patch Example

A good start for percussion...

  • Patch the output of Generator 2 (2) into the External CV Input and set the External Switch to the up position to modulate Generator 1.
  • Patch an envelope generator into the Index CV.
  • Listen to the Index Out.
  • If you set the Generator 1 Range Switch to the low position and the Generator 2 Range Switch to the mid position and adjust the fine frequencies, you get a nice percussion sound.

 

The Generator circuit was designed by Thomas O’Connor.

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