AM1035 Triple Modulator & Mix

OVERVIEW The AM1035 is a 14HP module that re-imagines a "lost" ARP module of the 2500 modular synthesizer. Prototypes of the original appeared in 1970 but the module never made it into production. The AMSynths module fills in a gap of synthesizer history for Eurorack.

The module has three discrete four quadrant modulators that provide ring modulation, mixing and VCA capabilities. 

DESCRIPTION Each of the three channels is based on the discrete transistor circuit (4014) from the 1005 module. The two independent inputs (X and Y) can be DC or AC coupled and are passed into the multiplier, with each input having a LEVEL control.

The output can be set to the result of the multiplier (MOD) for ring modulator tones or the result of  mixing the two input signals (MIX) after the LEVEL controls. Each channel can also be used as a VCA by connecting an audio signal into INX in AC mode and a 0 to +10V control voltage into INY in DC mode.

High quality Alpha potentiometers and Rogan knobs have been used to ensure control voltages can be easily set and adjusted. 

CONNECTIONS There are four 3.5 mm jack sockets for each channel;

• INX - Main input, either audio or CV
• INY - Second input, either audio or CV
• Output - Audio output

The inputs of channel 2 and 3 are normalisedto input 1 for parallel operation. There are three flat top orange LED's that indicate the output level of each channel. 

The module comes with a set of M3 mounting screws and washers, and a standard 16-way Doepfer power cable.

PRODUCTION STATUS: IN DEVELOPMENT