A studio built by a musician who got tired of leaving his session.

I’m a musician. For years I wrote songs in one place and did everything else somewhere else. When AI tools arrived, it got worse: upload stems to a website, wait, download a file, drag it back into the session, then fight it into key.

So I built a studio where I don’t have to. Harmonic Pro Studio is a complete music studio for Windows and macOS with one idea running through all of it: the tools should know what song you are writing. The key, the chords and the tempo are not just numbers in a corner of the screen. They reach the tools that need them. The band follows your chords, the EQ knows your key, and saturation keeps its harmonics in tune.

It is built for people who make music because they love it: people who record at home, producers who move between tools, and songwriters who want to hear their song played back. There is a lot of depth underneath for anyone who goes looking, but you never need to know it is there to make something good.

How it is built

Harmonic Pro Studio is written from the ground up: its own real-time audio engine, its own plugin host (including a bridge that lets older 32-bit plugins run in a 64-bit studio), its own effects and instruments, and its own music-theory engine behind the band. Every change goes through the same routine before it ships: scan, fix, verify.

Our promises

• Buy the studio once. You buy a licence, not a subscription. Updates for new versions are optional.
• Nimi is the one monthly plan, and it is optional. It runs on our servers and every request costs us money, so it can’t be a one-time purchase. You never need it to make music.
• Your version is yours forever. If you stop paying for updates, your licence keeps working, with every fix released while your updates were active.
• Works offline. Activate once. After that you never need an internet connection to make music. Only Nimi needs one.
• Your plugins are never limited. Every plan, including the free one, loads your own plugins.
• You can always get your work out. A project you made always opens and plays.
• If development ever stops, we will switch off activation and publish builds that run without it, so nobody loses the software they paid for.
• No ads, no trackers, no dark patterns.

Who we are

Harmonic Pro Studio is made by Westroo Digital (Pvt) Ltd, an audio software company in Colombo, Sri Lanka, founded by Sameera Attanayake. Say hello at hello@harmonicprostudio.com.