Winter '26
Aftertone & Signal

BRUME

Music Machine

A multi-timbral instrument purpose-built on Compute Module 5. Four synthesis engines, touch-first control, Lua scripting, and USB-C integration as a multi-channel audio instrument in your DAW.

◆ BRUME COMPLEX HARMONIC TIMBRAL MOD MIX MIDI SYS LIBRARY
◆ SIGNAL FLOW
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Four Engines

Each voice architecture draws from a different lineage of electronic instrument design

Complex
Inspired by DPO, Buchla 259, Brenso
Inspired by complex-oscillator designs such as the Make Noise DPO, Buchla 259, and Frap Tools Brenso. Dual oscillator with continuous waveshape morphing, through-zero FM, AM, ring modulation, hard sync, per-oscillator wavefolding, and phase distortion.
FM TZFM AM RING SYNC MORPH FOLD ANGLE
Harmonic
Inspired by Verbos, Kawai K5, Buchla 296
Inspired by instruments such as the Verbos Harmonic Oscillator, Kawai K5, and Buchla 296. Eight harmonics with Gaussian scanning, per-harmonic waveform morphing, FM on the fundamental, spectral tilt, odd/even balance, and phase spread.
SCAN MORPH FM TILT ODD/EVEN SPREAD INHARM
Timbral
Inspired by Serge NTO, Random*Source, CGS48
Inspired by the Serge New Timbral Oscillator, later Random*Source implementations, and CGS48-style approaches. Triangle core through a wave-multiplier-inspired shaper with linear FM, sub-oscillator, self-modulation feedback, and expanded symmetry.
TIMBRE SYMMETRY MULTIPLY LIN FM SUB FEEDBACK
Granular
Lineage: Xenakis, Curtis Roads, microsound
Generates pitched clouds of micro-oscillator grains with morphable waveforms. Each grain is synthesized from scratch using the same sine-to-square morph as Complex. Density, scatter, drift, and FM within grains produce textures from shimmering pads to atmospheric noise.
DENSITY SCATTER DRIFT MORPH FM ENVELOPE
MERIDIAN

A line you cross

One USB-C cable connects Brume to your DAW as a class-compliant multi-channel audio and MIDI instrument.

Arm a track, route MIDI out to Brume, record the audio back — all over a single cable. Brume appears as a native USB device on macOS, Windows, and Linux. No proprietary driver, no manager app required.

BRUME 4 engines · 24 voices USB-C audio + MIDI + clock YOUR DAW Bitwig · Logic · Ableton

Specification

Purpose-built on a Compute Module 5 with a low-latency Linux kernel and 10.1" capacitive touch display. Plays standalone or connects via USB-C as a multi-channel audio and MIDI instrument in your DAW.

Bill of Materials

Four components. One cable. Boot and play.

BCM 2712 8GB eMMC WiFi COMPUTE MODULE 5
CM5
Raspberry Pi Compute Module 5. Quad-core ARM A76, 8GB RAM, 32GB eMMC, wireless.
CM5 SOCKET GPIO USB-C HDMI USB-A ETH J2/OTG IO BOARD
CARRIER BOARD
CM5 IO Board with USB-C OTG for multi-channel audio and MIDI to your DAW. HDMI, GPIO, Ethernet.
HDMI+USB 10.1" TOUCHSCREEN
DISPLAY
Pick the HDMI touchscreen that fits your build. Brume’s UI is canvas-designed at 1024×600 logical resolution and auto-scales to whatever panel you connect — tap into the entire Raspberry Pi touchscreen ecosystem (Waveshare, MAGEX, WIMAXIT, Elecrow, SunFounder, and dozens of off-brand HDMI variants). The reference unit ships with a 10.1-inch 1920×1200 capacitive panel.
BRUME labwc + webkitgtk PREEMPT KERNEL LINUX BASE eMMC / 32 GB FIRMWARE IMAGE
FIRMWARE
Purpose-built Linux firmware with real-time audio kernel, Brume runtime, and atomic updates. Boots in seconds. New firmware installs over USB via the Brume companion app.

Signal Architecture

MIDI IN CHANNEL MAP COMPLEX HARMONIC TIMBRAL GRANULAR MOD MATRIX LFO · ENV · VEL SVF FILTER MIXER LEVEL · PAN · MUTE SEND BUSES SATURATOR CHORUS DELAY REVERB LUA FX SCRIPT FX + MASTER LIMITER · STEREO AUDIO OUT