This Module is currently available.
Triple Resonator
OVERVIEW ARP never made an analog resonator circuit but Korg did with the triple bandpass resonator in the PS3100 of 1977. This module is a re-imagining of this filter for the ARP 2500 Eurorack format.
The AM1076 module has three vactrol filters which can be independently adjusted for frequency, resonance and modulation depth. The modulation inputs are usually driven by one or more LFO’s to create band pass sweeps.
DESCRIPTION The AM1076 has rotary potentiometers (with ARP 2500 coloured knobs) at the top of the front panel are used to adjust the level of the individual filter outputs (CH-1 and CH-2). The CH-3 potentiometer pans between the input and output of channel 3. All three channel outputs are mixed together (at unity gain) and available at the MIX output.
The frequency and resonance of each channel is adjusted using slide potentiometers with subtle green LED lighting. The trimmer pots at the bottom of the panel control the level of frequency modulation from two inputs per channel, typically two LFO’s at different rates.
The signal inputs of CH-2 and CH-2 are normalised to CH-1 and both modulation inputs on CH-2 and CH-3 are normalised to CH-1. This makes parallel operation easy with minimal patching.
The output mix always has the outputs of CH-1 and CH-2 blended with a mix of the input and output of CH-3. This enables the input signal to be mixed with the outputs, or just the CH-2 output.
The first two resonators can be patched manually into series operation, with the option of using the mix out as a blend of CH-1 and CH-2 and CH-3.
CONNECTIONS There are four jack sockets for each channel:
Signal Input
Signal Output (Mix Out on CH-3)
Frequency modulation 1
Frequency modulation 2
The module comes with a set of M3 mounting screws and washers, and a standard Doepfer power cable.
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