The Harmony Codex is the seventh studio album by British musician Steven Wilson, released on September 29, 2023. This album marks a departure from his previous work, featuring two extended tracks that delve into complex musical landscapes. Wilson described the album as "a genre-spanning collection that opens up like a musical puzzle box," highlighting its intricate and conceptual nature.

The album was recorded between 2021 and December 2022 in Wilson's home studio in North London. It features contributions from several artists, including Ninet Tayeb, Craig Blundell, Adam Holzman, Jack Dangers, and Sam Fogarino.

Upon its release, "The Harmony Codex" received positive reviews for its ambitious scope and intricate composition. It charted at number 4 on the UK Albums Chart, number 72 on the Australian Albums Chart, and number 13 on the Finnish Albums Chart.

Tracklist:

Side A
A1. Inclination
A2. What Life Brings
A3. Economies Of Scale

Side B
B1. Impossible Tightrope
B2. Rock Bottom

Side C
C1. Beautiful Scarecrow
C2. The Harmony Codex

Side D
D1. Time Is Running Out
D2. Actual Brutal Facts
D3. Staircase