This is your interactive companion. Enter any chord pattern and instantly decode its emotional meaning — then go deeper with a full song analysis built on the framework from the book.
From the Book
"Every chord in a progression carries an emotional identity. When you learn to hear circuits instead of random chords, you stop playing notes and start speaking a language."
— The Feeling Behind the Notes, Chapter 3
Type chord numbers to get started. YouTube, audio, and sheet import are rolling out soon — manual entry works fully today.
Each chord is mapped to its emotional role from the book's framework — instantly, with no theory background required.
Use the song as the basis for exercises. Understand why it works — then write your own using the same principles.
Map every progression to its emotional circuit identity. Understand borrowed chords, modal interchange, and tension-resolution arcs.
Detect the song's key and tempo automatically. See how the verse, chorus, and bridge each use different emotional circuits.
Every analysis generates song-specific exercises drawn directly from the track — so you learn by doing, not by reading.
Available in three formats. The bundle pairs the eBook with a full year of Solo tool access — the best way to put the book into practice.
Type any chord pattern using the book's number system and instantly see the emotional role of each chord — free, no sign-up needed.
Use numbers from the book: 1 2m 3m 4 5 6m 7d — separate with spaces
Start free. Book owners redeem a promo code for Solo at $9.99/mo or $79/yr. Everyone else subscribes at the same rate — save 34% with annual billing.
Start with the decoder — free, no sign-up. Then open the full analysis tool to go deeper with any song in your library.
Honest thoughts from songwriters, students, and music educators who've used the tool and the book.