◆ Part 1 · Complex
Complex
DPO · Buchla 259 · Brenso
Dual oscillator with continuous waveshape morphing, through-zero FM, ring mod, hard sync, per-oscillator wavefolding, and phase distortion.
● Aftertone & Signal / Instrument № 01
Brume/bruːm/
A desktop multi-timbral music machine with four synthesis engines, a 10″ touch surface, and one cable to your DAW.
Controls · Harmonics
Signal Flow
Scope
OUT
Peak —RMS —
Modulation
LFO1→ ScanCenter +0.60
LFO2→ HarmonicTilt -0.30
Representative view · Harmonic engine · 1024×600 UI canvas auto-scales to any HDMI panel
01 / Engines
Four voices, four lineages.
Brume runs four synthesis engines with a shared voice tail (SVF filter, amp envelope, modulation router), so patches stay coherent across very different sources. Each engine has its own mechanism for continuous spectral change: cross-FM feedback in Complex, a scanning window in Harmonic, cascaded wavefolding in Timbral, grain scatter in Granular. No samples sit anywhere in the signal path; every voice is generated from live math.
◆ Part 2 · Harmonic
Harmonic
Verbos · Kawai K5 · Buchla 296
Eight harmonics with Gaussian scanning, per-harmonic waveform morph, FM on the fundamental, spectral tilt, and odd/even balance.
◆ Part 3 · Timbral
Timbral
Serge NTO · Random*Source · CGS48
Triangle core through a wave-multiplier shaper with linear FM, sub-oscillator, self-modulation feedback, and expanded symmetry.
◆ Part 4 · Granular
Granular
Xenakis · Curtis Roads · microsound
Pitched clouds of micro-oscillator grains with morphable waveforms. Density, scatter, drift, and FM within grains.
02 / Signal architecture
Every voice, the same path.
MIDI in, voice allocation, modulation, filter, envelope, mixer. Sends to delay and reverb. A Lua FX slot if you want to reach in.
03 / Meridian
One cable to your DAW.
USB-C carries multi-channel audio out, bidirectional MIDI, and clock. Class-compliant — no drivers, no manager app.
Source
Brume
4 engines · 24 voices · dry + sends rendered per part.
Link · USB-C
Audio · MIDI · Clock
Class-compliant. One port. Stereo out plus planned per-part stems.
Destination
Your DAW
Bitwig, Logic, Ableton, Reaper. Arm a track, point at Brume, record.
04 / Specification
Purpose-built on Compute Module 5.
Low-latency Linux kernel, Rust audio runtime, 10.1-inch capacitive touch. Boots fast. Bridges to your DAW over USB-C.
Engines
Complex · Harmonic · Timbral · Granular
Polyphony
24 voices · 6 per part
Filter
SVF per voice, 2 ADSR per voice
Modulation
2 LFO + 2 step seq per part
Effects
Saturator · Chorus · Delay · Reverb
Sends
Per-part delay + reverb sends
MIDI
USB class-compliant, clock sync
Audio
48 kHz stereo, line-out
Meridian
USB-C to DAW — audio + MIDI + clock
Display
10.1″ 1024×600 capacitive touch
Scripting
Lua 5.4 — sequencing, DSP, custom FX
Platform
Rust runtime, RT Linux, CM5 ARM A76
05 / Bill of materials
Four components. One cable.
Boot and play. The hardware is a deliberate assembly of off-the-shelf parts — the instrument is the firmware.
01 · Compute Module 5
CM5
Compute Module 5. Quad-core ARM A76, 8 GB RAM, 32 GB eMMC, wireless.
02 · Carrier board
Carrier Board
CM5 IO Board with USB-C OTG for multi-channel audio and MIDI to your DAW. HDMI, GPIO, Ethernet.
03 · Display
Touchscreen
Pick the HDMI touchscreen that fits your build. Brume’s UI is canvas-designed at 1024×600 logical and auto-scales to whatever panel you connect — tap into the CM5 touchscreen ecosystem. Reference unit: 10.1″ 1920×1200.
04 · Firmware
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.
Optional peripherals
05 · Reference controller
Controller
Korg nanoKONTROL2 is the reference USB-MIDI controller — 8 knobs, 8 faders, transport, and per-strip S/M/R. Brume ships with a default CC-mapping JSON plus a Lua starter script.
06 · Deep-control surface
Deep surface
Novation Launch Control XL 3 positions as the deeper control option — 24 endless encoders, 8 faders, 16 pads, transport. In development as a first-class surface: dedicated CC-mapping JSON with a per-engine page layout, Lua starter scripts.