~REVERIES IN THE RaiN~ AI: THE SOMNIUM FILES Soundtrack SPECIAL AGENT EDITION is the official soundtrack for AI: THE SOMNIUM FILES. It is included in the Special Agent Edition of the game in North America, Europe, and Australia.
On Steam, a limited bonus for AI: THE SOMNIUM FILES, also named ~REVERIES IN THE RaiN~, was released as part of a Limited Edition release of the game. This soundtrack only contained 17 tracks, all of which are also included in the physical release. This version of the soundtrack was made available physically for Japanese pre-orders.
A full soundtrack, titled RaiNBOW AFFaiR, including all 67 tracks in the game, was released on November 29th, 2019.
The songs, and their length, are listed below:
|1||告解 -kokkAI- (lit. Confession)||2:08||Plays at the title screen and flashbacks involving Falco|
|3||展開 -tenkAI-||1:21||Used in Boss's Office|
|7||問罪 -monzAI- (lit. Question)||1:27||Used during interrogation segments|
|9||敵對 -tekitAI-||1:48||Used during action segments requiring timed inputs|
|10||Awakening Interval||1:11||Used in the Matsushita Diner|
|11||Artist, Inc.||1:23||Used in the Lemniscate Office|
|12||Automobile Interior||1:22||Used while Kaname Date is driving|
|15||Atlantic Islands||1:21||Used in Sunfish Pocket|
|16||Ambidextrous Identity||1:35||Used in Marble|
|17||Armed Insurgents||1:23||Used in the Kumakura office|
|18||Ancient Impassivity||1:20||So Sejima's theme|
|20||PSYNCIN' IN THE FOUNTaiN||0:50||✓||Used at the start of every Somnium before the title card appears|
|21||SINKIN' IN THE BRaiN||1:43||✓||Used during SINKIN' IN THE BRaiN|
|22||PSYNCIN' IN THE PaiN||2:42||✓||Used during PSYNCIN' IN THE PaiN|
|23||PSYNCIN' IN THE DOMaiN||1:25|
|24||PSYNCIN' IN THE VaiN 1||2:42||✓||Used during PSYNCIN' IN THE VaiN, exclusively during the B path (Choosing "Turn the Dial")|
|25||PSYNCIN' IN THE VaiN 2||2:24||✓||Used during PSYNCIN' IN THE VaiN, exclusively during the A path (Choosing "Hit")|
|26||PSYNCIN' IN THE SWaiN 1||2:14||✓||Used during PSYNCIN' IN THE SWaiN as the standard music|
|27||PSYNCIN' IN THE SWaiN 2||1:24||✓||Used during PSYNCIN' IN THE SWaiN during Ota Matsushita's heroic scenes|
|28||PSYNCIN' IN THE SUSTaiN||2:27||✓||Used during PSYNCIN' IN THE SUSTaiN|
|29||PSYNCIN' IN THE CAPTaiN||2:15||✓||Used during PSYNCIN' IN THE CAPTaiN|
|30||PSYNCIN' IN THE CURTaiN||2:24||✓||Used during PSYNCIN' IN THE CURTaiN|
|31||PSYNCIN' IN THE VILLaiN||2:35||✓||Used during PSYNCIN' IN THE VILLaiN|
|32||PSYNCIN' IN THE MaiN 1||2:02||✓||Used during PSYNCIN' IN THE MaiN: 1|
|33||PSYNCIN' IN THE MaiN 2||3:01||✓||Used in the Ikume Shrine and the early parts of PSYNCIN' IN THE MaiN: 2|
|34||PSYNCIN' IN THE MaiN 3||1:49||Used in the later parts of PSYNCIN' IN THE MaiN: 2|
|35||PSYNCIN' IN THE MOUNTaiN||2:24||✓||Used during PSYNCIN' IN THE MOUNTaiN|
|36||PSYNCIN' IN THE REFRaiN||2:34||Used during PSYNCIN' IN THE REFRaiN|
|37||PSYNCIN' IN THE STRaiN||0:46||Plays whenever a Psync segment is failed, and during some scenes in Somnium after one is completed successfully|
|38||Invincible Rainbow Arrow -Vocal Solo-||4:23||✓|
|39||Invincible Rainbow Arrow -Instrumental-||4:22||✓|
- Aside from the "Invincible Rainbow Arrow" covers, every song in the soundtrack has a play on the letters "AI".
- Songs used on various types of scenes are written in Japanese, with its romanization containing the pairing "AI" at the end of the word, all of them rhyming.
- Songs used on specific locations are given two words for their title, the initials of both being A and I in that order.
- Songs used in Somnia are titled the same as their respective Somnium worlds, which all rhyme with "PSYNCIN'/SINKIN' IN THE ---aiN", the "ai" remaining uncapitalized.