Browser G-code Sound Test

Paste G-code. Hit play. Hear the beeps on your laptop.

This page interprets M300 commands in your browser and plays them through your speakers, so you can audition printer beep patterns without touching a printer.

Upload MIDI Volume Speed 100% Waveform

No MIDI loaded. Upload a .mid file to convert it into playable G-code.

Output Laptop speakers

Audio Ready

Playback Idle

G-code

Log

Ready.

How it works

M300 S880 P200 plays an 880 Hz tone for 200 ms.
G4 P150 inserts a 150 ms pause between notes.
MIDI import turns notes into M300 and silence gaps into G4.
The speed slider rewrites M300 P... and G4 timing in the editor.
Stop cuts playback immediately and silences any active tone.
Other G-code lines are ignored and noted in the log.
Chord-heavy MIDI is flattened to one melody line by keeping the highest active note.