Master music theory by ear and by hand.
Solfa is a free, browser-based practice tool. Play a real piano, explore chords and scales that light up on the keyboard, and program drum patterns — all without installing anything.
Start Playing →Interactive Tools
🎹 Piano
Play two full octaves with your mouse or computer keyboard. Change octave, toggle sustain, and hear how notes sit against each other.
Open Piano🎼 Chords & Scales
Pick a root and a type — major, minor, Dorian, pentatonic — and see the exact notes light up on a keyboard as they play.
Explore Chords🥁 Beat Maker
Program a 16-step pattern across five drum voices. Set the tempo, hit play, and build rhythm from scratch.
Make a BeatLearn Music Theory
In-depth guides that pair with the tools. Read the concept, then hear it immediately.
Major vs Minor Scales
What's the difference, and why it changes the entire mood of a song.
Read guide →7 Chord Progressions
Essential progressions every producer should know, with audio examples.
Read guide →Frequently Asked Questions
Is Solfa really free?
Yes. All three tools are free to use, with no signup and no premium tier. The site is supported by ads.
Do I need to install anything?
No. Solfa runs entirely in your browser using the Web Audio API. If you can open a web page, you can use it.
Does it work on phones?
Yes, all tools are responsive. That said, the piano and beat maker are easier to use on a desktop or laptop.
Solfa Theory has been online since 1 September 2026.