Paper-Synthesizer 110 - Wave Converter

by Antti Pussinen and Wolfgang Spahn

In this paper synthesizer workshop,we look into, and build a wave shaper board for our PS110 Volage Controlled Oscillator. The waveshaper converts saw wave to sine, square and triangular waves. It also ads and input and control for linear frequency modulation and pulse width modulation for square output. It is also possible to build a volage controlled oscillator core, if you missed our last workshop.

The wave shaper takes the saw wave of the oscillaotr core and makes other waveforms on the same frequency. Triangle wave is what you would expect from a tri oscillator.

Square wave is an analog squ osc with sharp peaks in vertical parts of the wave, making it super crispy sounding. It also has an pulsewidth potentiometer and cv input and attenuation for pwm.

Sine wave is not the purest available but a cool sounding, bit squarish sound with low 1st harmonic content, but harmonics increase on higher harmonic frequencies.

Sinus Wave:

Triangular Wave:

Square Wave:

A Voltage Controlled Oscilator, or vco, is the heart of any musical synthesizer. It usually forms the starting material for subtractive audio synthesis. An analog VCO of this kind creates an audible waveform by charging and discharging a capasitor. Voltage control enables one to control the frequency of the produced waveform in selected musical scale and play notes or a melody.

Features -compatible with euro rack format -built in power supply for stable voltage response and possibility to power over usb cable -1V/octave response(configurable to 1v/hz) -exponential frequency modulation with attenuation potentiometer -sync input with sync level adjustment -saw wave 10vpp output

additional features with wave shaper board -sine, square, pulse width modulation and triangle outputs 10vpp -pwm modulation cv input -Linear frequency modulation with attenuatio potentiometer

All the tool and materials will be provided. The workshop will be held in German and English

Please let us know if you are interested in building the oscillator core or the waveshaper board. In this workshop we dont have time to go deeper into the inner workings of vcos since we arre building two projects at the same time.

All the tools and materials will be provided.
The faceplate is not included!
The workshop will be held in German and English.

Mai 09 2015, 11am - 5pm

Werkstatt Berlin
Mülhauserstr. 6. Hofgebäude 1. OG, 10405 Berlin

Costs: 30,00€ plus 20,00€ for the materials.
Registration: post<at>wolfgang-spahn.de