Tiptop Audio — TOMS909

• Manual PDF

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TOMS909 Cheat Sheet

Tiptop Audio | Analog 909 Tom Drums for Eurorack

Quickstart

1. Patch a gate (e.g. from a trigger sequencer) to any Tom's GATE IN.
2. Patch each Tom’s OUT or the MIX OUT to your sound system.
3. Set LEVEL & ACCENT to taste.
4. Adjust DECAY for drum body/length.
5. Adjust TUNE for pitch.
6. Optionally, patch CV for VC-TUNE or ACCENT IN for modulation.

Inputs & Outputs Reference

Low Tom (Left Section)

• LOW GATE IN: Gate/trig input to trigger Low Tom. (+5V typical, accepts standard modular triggers)
• LOW OUT: Audio out for Low Tom (individual)
• VC-L-TUNE IN: CV input for Low Tom pitch (TUNE). (CV range: Not 1V/Oct, ±5V recommended)
• ACCENT IN: Gate/CV input for dynamic accent. (accepts gates/trigs/CV, +5V typical)

Mid Tom (Middle Section)

• MID GATE IN: Trig input for Mid Tom (+5V typical)
• MID OUT: Audio out for Mid Tom
• VC-M-TUNE IN: CV for Mid Tom pitch (CV range: ±5V recommended, not 1V/Oct)
• ACCENT IN: As above

High Tom (Right Section)

• HI GATE IN: Trig input for High Tom (+5V typical)
• HI OUT: Audio out for High Tom
• VC-H-TUNE IN: CV for High Tom pitch (CV range: ±5V recommended, not 1V/Oct)
• ACCENT IN: As above

Mixed Output

• MIX OUT: Mix of all three Toms for summed output.

Controls Reference

• LEVEL (per Tom): Drum output volume.
• ACCENT (per Tom): Sets max accent gain, and functions as fine gain trim.
• DECAY (per Tom): Adjusts drum length from percussive click (CCW) to long tom (CW).
• TUNE (per Tom): Sets pitch/timbre.
• VC-TUNE ATTENUATOR (per Tom): Scales applied CV for each Tom’s pitch input.

Voltage Control Details

• VC-TUNE IN: Not 1V/Oct. Responds throughout ±5V. Used for modulation/sequencing of TUNE.
• ACCENT IN: Can take gates or CV (up to +5V). When patched, incoming signal sets dynamic accent (volume boost, more attack/noise). ACCENT knob scales the difference.

Extra Features & Tips

• Patch all Toms for polyrhythms: Use multiple gates/triggers for rhythmic complexity.
• Patch mixtures: Individual OUTs for separate processing/panning, or use MIX OUT for classic 909-style sum.
• Dynamic playing: Use sequencer CV/gates to modulate ACCENT or TUNE for evolving textures.
• Audio Rate FM: Patch audio oscillator (e.g., a VCO) to VC-TUNE INs for metallic, harmonically rich toms.
• Bus Mixer: Can be routed to MIXZ module via header.

Typical Applications

• Classic 909 toms in your modular rig.
• Dynamic, voltage-controlled tom sounds.
• Sound design: metallic, pitched percussion with FM.

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