MAD SCIENTIST MUSIC TOOLS · MIDI ARRANGER

The Secret Band.

Your piano. Your band.

Mad Scientist Music Tools
MIDI disconnected
LIVE · CHORD
C
Play a left-hand chord on your piano
Your hands lead. The band follows.
Recognises chords below your split point.
PERFORMANCE CONTROLS
CURRENT STYLE
Jazz Trio4/4
Swing · piano, upright bass and light drums
BAND ENERGY
2 · Relaxed
Bar 1 · beat 1
THE BAND · MIXER
LEFT HAND
Connect MIDI for Local Off + Echo On.
THE LIVING BAND

Four musicians, one band

Separate MIDI channels · GM sounds
Band energy shapes phrasing and note density. Human Feel adds subtle touch and timing. GM sounds depend on your piano; audition each style on the Donner.
STYLE LIBRARY

12 styles with a personality

A vintage-minded band: distinct grooves, four-bar phrases, responsive accompaniment and tasteful fills. Disco Night remains as a later-era favourite.
SONGBOOK · LOCAL

Save your band setup

Saves style, tempo, variation, energy, Human Feel, volume and pan in this browser. No audio or MIDI recording.

MIDI · DONNER DDP-80 PRO

Connection and performance

Use wired USB MIDI in Chrome or Edge.

APP · VERSION 0.7

Open the hosted app to install it.

Steady mode · no automatic or manual fills.

PEDALS · HANDS ON THE KEYS

Left starts · middle stops · right remains sustain. Your Donner may send different MIDI messages.

Pedal test: waiting for MIDI

Pressing a pedal (value ≥ 64) starts or stops the band once. Releasing does nothing. Pedal control requires incoming MIDI messages.

PIANO · ECHO ROUTING
MIDI CHANNEL PLAN

Piano 1 · Drums 10
Bass 2 · Chords 3 · Extra 4

Connected setup sends Local Off and echoes your keys to GM piano 1. Sustain follows the piano. Band Stop leaves your piano playable.

Left piano: off mutes keys at or below the split, while those keys keep controlling the band. Local Control commands are sent, not confirmed by the piano.

Pan uses standard MIDI CC10. Stereo placement depends on your piano and speakers.

GETTING STARTED

Play with the band

1 · Connect & play

Connect USB MIDI in Settings. Play chords below the split point. The chord display follows your left hand; your right hand stays free.

Major, minor, 7, maj7, m7, dim, aug, sus2 and sus4 are recognised.

2 · Lead the band

Choose a style. A–D and Band Energy shape activity; Human Feel shapes touch and timing. Intro, break and ending follow the bar. Fills are removed for a steady groove.

Left CC67 starts, middle CC66 stops. Right CC64 remains sustain. Release does not trigger an action.

3 · Shape your sound

Use the four upright faders in Play. Each has volume, mute and a left/right pan control. Double-click Pan to centre it.

Playing musicians glow and move subtly with their MIDI notes. The three illustrated styles show their band in Play and Styles. Muted players rest. Shade darkens the wood; both finish and shade are saved.

4 · Install & update

Publish the ZIP on your existing HTTPS Cloudflare address. In Settings choose Install app, or use your browser’s Install / Add to Home Screen menu.

Upload future releases to that same address. Choose Check for updates, then Update and reopen while stopped. SongBook stays in this browser.

Version 0.7: steady grooves without fills. MIDI connection enables Local Off + Echo On with GM piano 1, gently brighter CC74 (device-dependent). Left piano on/off affects only echoed notes below the split. Use Restore normal piano to return to Local On. Close SecretKeys before using this app. Installation and updates still use the same HTTPS address.