Plug in your digital piano and play any chord. Harmony Hound tells you what it is, which key it belongs to and the job it's doing, so you understand your playing instead of memorising shapes.
▶ Start playing — free, no sign-up
We'll be in touch when your early access is ready. In the meantime, follow @harmonyhound for chord tips.
Works with most USB digital pianos and keyboards. No piano? The on-screen keys work too.
Most chord apps hand you a list of shapes to memorise. Harmony Hound listens to what your hands are already doing and explains it.
Connect your digital piano with a USB cable, or use the on-screen keys on any device.
Play any chord, in any inversion. Pedal as much as you like; the hound only listens to the keys you're holding.
The chord's name, its numeral in the key, its inversion and its job, all colour-coded the same way on every screen.
Play on your real piano and watch every chord get named, numbered and explained as you play.
Every scale degree has its own colour in every key, so patterns jump out before you know the names.
See how each key is built and why its seven chords belong together. Major and minor.
Name That Chord, Numbers Rush and Chord Drop turn theory into quick reflexes, on screen or on your piano.
The chord progressions behind real songs, and why they work.
A daily session with streaks and levels. Small, regular practice that adds up.
"I'm an adult piano learner. I could play chords, but I didn't understand why they went together, and every resource I found just wanted me to memorise more shapes. So I built the tool I wished existed: one that listens to what I play and explains it."Andy, creator of Harmony Hound
Yes, during early access. Later there'll be a free version and an optional paid upgrade with extra content. Early access members will hear about it first.
No. Everything works with the on-screen keys. A digital piano makes it much more fun, though, because you get the live theory mirror on real keys.
If you can play a basic chord, you're ready. Harmony Hound starts with what you can already play and builds from there.
Both. It runs in your browser and can be installed to your home screen like an app. It works offline once installed.
There's no account to create. Your progress stays on your own device. We only ask for your email if you'd like early access and updates.
We'd love to hear from you. Pick that option when you sign up, so we can understand what you'd need.
Join early access, try it free and help shape what we build next.
We'll be in touch when your early access is ready.