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. Features 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 Video: https://youtu.be/M4cpFW0V48UProduct Specs Item Number: 34273 Make: Serge Modular Model: Jürgen Haible LIVING VCOS Condition: Brand New Finish: Silver Categories: keyboards-and-synths ⇒ eurorack Function: Distortion Oscillator VCA Made In: Germany MPN: SM-JHVCOS Modular Grid: Eurorack ⓘ + Dimensions*: 42 HP 30 mm deep Power*: 150 mA +12V 125 mA -12V ? mA 5V * User contributed details