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noise and square source

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CV SQUARE

SQUARE

METALIC

WHITE

PINK

DIGITAL

COW

(NOISE)²

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Simple square wave oscillator tuning by knob and CV

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two square wave oscillators with a fixed frequency ratio
suitable for making cowbell sounds - tuning CV input 
is shared with the square wave

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CV input for square wave and cow generator 
(0-10V range)  

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6 square wave oscillators summed through an analog 
circuit with frequency ratios inspired by the 808 (can 
be used as base for synthesizing hats and cymbals)
tuneable with a knob and CV 

Noise square is a simple noises and squarewave generator. 
There are two analog noise generators, WHITE noise  
and PINK noise. All other sound sources are generated 
digitally. There is also a METALIC noise source, which is 
a 6 oscillator sound bank, with frequency ratios inspired 
by the 808. It is generated digitally (but with analog 
summing) and has a TUNE and CV control option. The 
DIGITAL noise output generates digital noise which has 
adjustable TUNE and CV control. The SQUARE and COW 
outputs have one square wave signal in common and the 
COW output has another square signal added at a specific 
frequency, to get the cowbell sound easily. There are 2 
CV inputs for controlling the digital sound sources. For 
the first CV input there is a switch to select whether it 
controls the METALIC noise or DIGITAL noise tuning. The 
second CV input is dedicated to both the SQUARE and 
COW outputs. The CV inputs react to a range of 0-10V. 

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digital noise generator with adjustable sample rate 
via a knob and CV 

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The CV input switch either sends the incoming CV 
to the digital or metalic noise generator (0-10V range) 

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analog white noise generator

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analog pink noise generator

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FTDi breakout
the Noise square firmware is open source and open for 
hacking. It can be done with the Arduino programming 
environment. All you need is a FTDi USB connector 
breakout (or an equivalent Arduino compatible 
substitute). 

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