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Shared-Piano-Playbot

🎵 Play MIDI files on Google Shared Piano 🎹

Play Demo

Please click the gif below to watch full video :) playbot_demo

Main Features

  • Auto-play midi files
  • Transpose (Pitch Shifting)
  • Auto sustain & sustain controls

How to Install

  1. Install Tampermonkey chrome extension.
  2. Add Playbot script to Tampermonkey.
  3. Tampermonkey will automatically run Playbot script if you visit Shared Piano webpage.

How to Use

  1. Open Shared Piano webpage and press ctrl + m.
  2. Select your midi file from the file explorer.
  3. Hit Enter to start playing. (please wait for a second)

Shortcuts

Main control

  • Open file explorer: ctrl + m
  • Start playing: Enter

Transpose

No need to press shift key.

  • Pitch +1: +
  • Pitch -1: -

Sustain

Sustain will automatically be turned on.

  • Turn off: ←
  • Turn on with minimum interval: →
  • Longer interval: ↑
  • Shorter interval: ↓

Reminder

  • Too much amplitude will cause audio clipping.
    • Try Night of Nights black midi if you're curious.😉
  • Too long sustain interval will trigger Tone.js limit & cause load error from Shared Piano.
    • In this case, some keys won't sound properly.
    • It will be fixed if you immediately turn off the sustain with ← key for a bit.

WIP

  • Direct midi file convert ✅ Support since v1.0!
  • Velocity

WIP but not soon

  • Better sustain interval
  • UI
  • Pause & Replay
  • Play speed control