Play music with your computer keyboard
A free browser synth you play with the keys you already have, with twenty visuals that move to what you play. Chords, bass lines, drums and pads — in a tab, nothing to install.
Who this is for
- People without an instrument at hand
- Students exploring notes and chords
- Streamers and party hosts
Chords, drums and bass from one keyboard
Hold several keys for chords (up to fourteen voices), tap 1 to 7 for kick, snare, hat, clap, tom, open hat and rim, and switch to Bass for low lines. Z and X move the octave three steps each way.
It sounds like an instrument
Each instrument is a two-oscillator synth with a filter envelope and a compressor on the master bus, so it sits at a stable level whatever you play.
Every note is visible
The audio is analysed in real time, so the visuals show pitch, loudness and rhythm truthfully — a useful way to hear with your eyes.
How to do it
- Open BLOOB and click “Play the keys” (or press K)
- Play A–L for white keys, W E T Y U for the black keys; 1–7 are drums
- Pick Keys, Pluck, Bass, Pad or Bell; Z / X shift the octave
- Change the visual with ← → while you play, and Record if you like it
Questions people ask about play music with computer keyboard
Which keys are which notes?
A C, W C#, S D, E D#, D E, F F, T F#, G G, Y G#, H A, U A#, J B, K C, O C#, L D, P D#, ; E, ' F.
Why are some app shortcuts off while I play?
Letters are notes while free play is on; arrows still change the visual and Escape exits.
Can I use a MIDI keyboard instead?
Yes — click “MIDI keyboard”.
Can I record it?
Yes, with the Record button, and export to MP4.
Related: piano visualizer online · midi keyboard visualizer · live instrument visualizer · free audio visualizer