Check the listing for details. Blue Lantern CMOS FX Processor MK2 Drone Voice Eurorack Module. Condition: New. Listed at 162.96 USD. Blue Lantern CMOS FX Processor MK2 Drone Voice Eurorack Synth Module Description From Blue Lantern: What does this do? This module has all the internal circuits to complete a voice: sound generation + envelope generation + amplifier control. The sound generation is interesting. The core is using 3 CMOS based oscillators that are performing exclusive or logic. This is known as XOR ring modulation. This entire circuit is being voltage starved, a technique common among the advanced circuit bending hobby. For example, portable vintage toys that use batteries sound different as there batteries loose voltage. I designed a CV controllable circuit that simulates the dying batteries scenario. This is where the products name comes from: CMOS FX Processor. Incoming audio is internally conditioned to be those dying batteries. To my knowledge I dont think there is any other euro format product that uses this technique. Features Width: 16hpCurrent: +35mA,-34mAPCB Stack: 1 level. Skiff compatible Attributes Type (X): Eurorack Synth ModuleColor (X): BlackRail Width (X): 16hpModel Name (X): CMOS FX Processor MK2