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Manufacturer Description:
module a-119 (external input / envelope follower) is designed to allow external audio signals to be integrated into the system a-100. it comprises a pre-amp, envelope follower, and comparator.

the pre-amp has two inputs: an unbalanced input for line level signals, with a gain factor of from 0 to 20, and a balanced input with a gain factor of from 0 to 500, for insertion of low level signals, for instance from a microphone or electric guitar.

the envelope follower reads the signal level of the input, and puts out a proportional voltage as an envelope at its own output.

the comparator generates a gate signal whenever the input goes above an adjustable trigger threshold.

three leds help you keep track of overload, the envelope, and the gate signal.

this module has a maximum current draw of 30ma. it requires 8 te/hp worth of space to fit in a eurorack frame.