Acid Rain Technology Trellis
Stereo 6×3 matrix mixer — 36 VCAs route six stereo inputs to three stereo outputs.
22 HP Eurorack module
Trellis is a fully voltage-controlled stereo matrix mixer. Six stereo input rows meet three stereo output columns at 18 matrix cells; each cell contains a stereo VCA pair (36 VCAs total) with both a maximum-level knob and a dedicated CV input. That means every source can be routed, at any level, to any combination of outputs, dynamically modulated by CV in real time. Inputs normalize to mono when only the left jack is patched; outputs collapse to mono when only one side is patched. The simple, geometrically-laid-out panel reflects the simple model — six rows of inputs, three columns of outputs, and a knob plus CV jack at every intersection.
Controls & Jacks (54)
- In 1 L — Left audio input for row 1. Normalizes to mono if only one input used in this row.
- In 1 R — Right audio input for row 1. Normalized from L when unused.
- Row 1 → Out I CV — CV input modulating the VCA at the (Row 1, Out I) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 1 → Out II CV — CV input modulating the VCA at the (Row 1, Out II) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 1 → Out III CV — CV input modulating the VCA at the (Row 1, Out III) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 1 → Out I — Sets maximum send level from input row 1 to output I. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to this
- Row 1 → Out II — Sets maximum send level from input row 1 to output II. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to thi
- Row 1 → Out III — Sets maximum send level from input row 1 to output III. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to th
- In 2 L — Left audio input for row 2. Normalizes to mono if only one input used in this row.
- In 2 R — Right audio input for row 2. Normalized from L when unused.
- Row 2 → Out I CV — CV input modulating the VCA at the (Row 2, Out I) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 2 → Out II CV — CV input modulating the VCA at the (Row 2, Out II) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 2 → Out III CV — CV input modulating the VCA at the (Row 2, Out III) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 2 → Out I — Sets maximum send level from input row 2 to output I. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to this
- Row 2 → Out II — Sets maximum send level from input row 2 to output II. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to thi
- Row 2 → Out III — Sets maximum send level from input row 2 to output III. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to th
- In 3 L — Left audio input for row 3. Normalizes to mono if only one input used in this row.
- In 3 R — Right audio input for row 3. Normalized from L when unused.
- Row 3 → Out I CV — CV input modulating the VCA at the (Row 3, Out I) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 3 → Out II CV — CV input modulating the VCA at the (Row 3, Out II) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 3 → Out III CV — CV input modulating the VCA at the (Row 3, Out III) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 3 → Out I — Sets maximum send level from input row 3 to output I. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to this
- Row 3 → Out II — Sets maximum send level from input row 3 to output II. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to thi
- Row 3 → Out III — Sets maximum send level from input row 3 to output III. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to th
- In 4 L — Left audio input for row 4. Normalizes to mono if only one input used in this row.
- In 4 R — Right audio input for row 4. Normalized from L when unused.
- Row 4 → Out I CV — CV input modulating the VCA at the (Row 4, Out I) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 4 → Out II CV — CV input modulating the VCA at the (Row 4, Out II) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 4 → Out III CV — CV input modulating the VCA at the (Row 4, Out III) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 4 → Out I — Sets maximum send level from input row 4 to output I. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to this
- Row 4 → Out II — Sets maximum send level from input row 4 to output II. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to thi
- Row 4 → Out III — Sets maximum send level from input row 4 to output III. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to th
- In 5 L — Left audio input for row 5. Normalizes to mono if only one input used in this row.
- In 5 R — Right audio input for row 5. Normalized from L when unused.
- Row 5 → Out I CV — CV input modulating the VCA at the (Row 5, Out I) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 5 → Out II CV — CV input modulating the VCA at the (Row 5, Out II) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 5 → Out III CV — CV input modulating the VCA at the (Row 5, Out III) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 5 → Out I — Sets maximum send level from input row 5 to output I. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to this
- Row 5 → Out II — Sets maximum send level from input row 5 to output II. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to thi
- Row 5 → Out III — Sets maximum send level from input row 5 to output III. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to th
- In 6 L — Left audio input for row 6. Normalizes to mono if only one input used in this row.
- In 6 R — Right audio input for row 6. Normalized from L when unused.
- Row 6 → Out I CV — CV input modulating the VCA at the (Row 6, Out I) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 6 → Out II CV — CV input modulating the VCA at the (Row 6, Out II) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 6 → Out III CV — CV input modulating the VCA at the (Row 6, Out III) matrix cell. Sets the actual gain; the knob caps the maximum.
- Row 6 → Out I — Sets maximum send level from input row 6 to output I. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to this
- Row 6 → Out II — Sets maximum send level from input row 6 to output II. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to thi
- Row 6 → Out III — Sets maximum send level from input row 6 to output III. CCW = silent, CW = unity. The corresponding row CV input scales actual gain up to th
- Out I L — Left channel of stereo output I. Mixes to mono if only one output jack is patched.
- Out I R — Right channel of stereo output I. Mixes to mono if only one output jack is patched.
- Out II L — Left channel of stereo output II. Mixes to mono if only one output jack is patched.
- Out II R — Right channel of stereo output II. Mixes to mono if only one output jack is patched.
- Out III L — Left channel of stereo output III. Mixes to mono if only one output jack is patched.
- Out III R — Right channel of stereo output III. Mixes to mono if only one output jack is patched.
How-To Guides
- Static Stereo Mix
- Three Independent Aux Sends
- Voltage-Controlled Stereo Morph
- Rhythmic Routing
Explore the interactive Trellis panel on BleepDex — tap any control to learn what it does.