Harebrainer

Sheet B-08 · Audio · Instrument firmware

AFTERGLOW

A five-knob stereo effects box that sits next to a MicroFreak or SP-404. DSP, firmware, renders and parts list are done; the circuit board is next.

Status
In development
Made
DSP in Python, then C++ · Daisy Seed firmware · Blender renders · Parts list
Date
2026
Revisions
49 · last 2026-10-22

Drawing notes · 05

  1. 1GLOW: the gold knob
  2. 2Engines: VOICE, TIME, SPACE, MOTION
  3. 3OLED with a small round creature
  4. 4IN / OUT L-R on 1/4" TRS, MIDI, clock, USB-C
  5. 5Daisy Seed inside
AFTERGLOW prototype render: black and gold panel, four black knobs and a gold GLOW knob with amber LED rings, an OLED and a smoked acrylic base glowing amber.
Render of the prototype

Listen · the signal, drawn live

Scope · time
XY · left against right
Spectrogram · 20 Hz to 20 kHz, log

Knob moves over synthesized test material, rendered by the AFTERGLOW DSP.

Download the drawing (SVG, plotter-ready)