This Module is currently available.
Ramp Core VCO
Features:
– V/Oct. CV input for exponential frequency modulation
– 2x exponential modulation CV input with manual controllable amount
– Input for linear frequency modulation
– manual controllable amount of frequency modulation
– Synchronisation input
– voltage controlled continuous threshold of synchronisation (no sync soft sync hard sync core lock)
– polarized attenuator for voltage controlled continuous threshold of synchronisation
– manual and voltage controlled pulse width modulation
– high frequency range, switchable between overlapping low, mid and high pitch areas
– tune: 10-turn precision potentiometer with scale knob
http://audiophilecircuitsleague.com/products/variable-sync-vco.php
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These merchants probably sell this module. Huh?