Altered State Machines — Eris

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Manual PDF: Eris 4x4 Matrix Mixer by Altered State Machines

Eris 4x4 Matrix Mixer Cheat Sheet

Overview

4x4 matrix mixer: 4 inputs x 4 outputs, 12hp
Mixes and routes audio or CV signals (DC coupled)
Linear potentiometers control send level from any input to any output
Each channel can amplify up to 4x input (makeup gain/overdrive)
Auxiliary input/output with soft vactrol-based mute
Toggle switch (rear): Aux input gain (Unity/x2)
Suitable for mixing (audio, CV, FX send/return, feedback, modulation matrices)

Controls & Jacks Reference

Inputs (Jacks)

Inputs 1-4 (Top Row, Left)
Accept audio or CV signals
Typical modular range: ±10V (not specified, but standard for Eurorack, module is DC coupled)
Each input may be summed to any output
Auxiliary Input
Signal is summed with Output 1 before being routed to Aux Output
Gain: Switchable (Unity or x2 via rear toggle)
Mute: Vactrol-based soft mute (button or toggle on front panel)

Outputs (Jacks)

Outputs 1-4 (Top Row, Right)
Each receives mixed signal according to matrix settings
Auxiliary Output
Sum of Aux Input and Output 1 (post-mix), subject to mute status

Knobs / Potentiometers

16 Channel Level Knobs (4 per input/output crosspoint)
Each knob controls send level from one input to one output (linear response)
Levels up to 4x amplification of input signal

Switches

Aux Input Gain Toggle (Back Panel)
Selects between Unity Gain (1x) and high gain (2x) for Aux In
Aux Mute (Front Panel/Button)
Soft vactrol-based mute for Aux Input (clickless)

Typical Use Scenarios

Basic 4-Input Mixer: Route all to Output 1 as main mix.
FX Send/Return Matrix: Send Outputs 2/3/4 to effects, return effected signals to Aux In.
Modulation Matrix: Route various CV signals to different destinations.
Feedback Networks or Cybernetic Circuits
Kick Drum/Accent Mixing: Use Aux channel for bringing in/out specific sounds.

Power / Specs

Size: 12 hp
Current Draw: +12V 17mA, -12V 3mA, 0mA 5V
DC Coupled: Handles audio & CV equally

Compliance & Limitations

EU (RoHS): Not currently shippable to EU (vactrol in Aux mute, RoHS version pending)

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