Serge Modular Jürgen Haible LIVING VCOS

Jürgen Haible's goal was to build a set of VCOs that have the untamed bass range power of early EMS and Moog VCOs, but which are tracking a keyboard voltage over 5 or more octaves nevertheless. "Untamed" Beating in the bass range and controlled beating in higher octaves is not possible with standard exponential 1V/Oct oscillators.
A great part of that special sound of early Moog and EMS oscillators is not because of any "randomness", "unstability", "instability" or "noisyness", as so often is said.
A good deal of their behaviour is because of that, but it is not the whole story. There are also some very deterministic factors in these old circuits which were unpleasant side effects for the designers back then, but which are worth a closer analysis when we're designing a musical VCO today.

• Faithful adaption of Jürgen Haible's design
• Discrete, noisy servo in expo converters (VCS3 feature)
• Emulation the low frequency behaviour of linear (Hz/V) VCOs and of leakage (EMS VCOs)
• Capable of very pleasant beat rates between the VCOs over the entire keyboard range
• Allows rich and powerful animated bass sound, and smooth "phasing" slow-beating sound in higher octaves
• Discrete (no opamp) pulse width modulators (capable of smooth audio rate PWM)
• VCO driver with two CV inputs, LFO oscillator with limited speed range
• Accepts vibrato
• Exponential (RC-Shaped) Portamento
• Added Triangle and Sine outputs
• Added SYNC inputs

• 42 HP 30 mm deep

Distortion Oscillator VCA

Found Sound Australia Pty Ltd.
110 Albert St
Brunswick East, VIC 3057
Australia