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music · analog

An analog drum voice, designed by AI

Hats and snares start as noise, not as samples. This board is a gated analog drum: a transistor noise source into an OTA filter, an attack/release envelope from a gate jack, and an OTA VCA into headphones. No MCU. Describe the hit; Ohmni wires the analog chain.

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A compiled board from the studio. Drag to look around.

What ends up on the board

  • USB-C power; noise and OTAs on the 5 V rail, envelope and headphones on 3.3 V
  • Charge-pump negative rail so the filter and VCA swing around ground
  • Transistor noise source into an OTA low-pass VCF
  • Attack/release envelope from a gate jack opening the filter and VCA
  • DirectPath headphone amp

How Ohmni designs it

  1. The drum is composed from light blocks — noise, VCF, envelope, VCA — not a sample ROM.
  2. The noise source is kept on the 5 V rail (it needs the headroom) and the layout is rule-checked before you see it.
  3. You download gerbers, a BOM, and a 3D preview, ready for your fab.

Design this board now

The prompt below goes straight into the studio. Edit it there, or use it as-is.

USB-C analog drum voice, no microcontroller: transistor noise into an LM13700 VCF, attack/release envelope from a gate jack opening the filter and VCA, charge-pump negative rail, and a 3.3V headphone amp.
Free to use