株式会社ウェーブマスターは、セガのアクションゲーム「ソニック・ザ・ヘッジホッグ」シリーズの関連楽曲として、「ソニックと秘密のリング」、「ソニックと暗黒の騎士」のサウンドトラックを、8月29日よりiTunes StoreやAmazon MP3などで配信開始した。1曲150円で全曲各1,500円。

　「ソニックと秘密のリング」と「ソニックと暗黒の騎士」は、本や伝説の世界を舞台にしたシリーズ作品で、今回はその関連楽曲が配信された。各サウンドトラックのiTunes Storeでの配信URL、ならびに配信楽曲は以下の通り。

■ 「Sonic And The Secret Rings Original Soundtrack Vol.1」

　配信URL： http://itunes.apple.com/jp/album/id555394902

[配信楽曲]
01. Seven Rings In Hand
02. The Lost Prologue
03. Let The Speed To Mend It
04. Poison Spear
05. The Wicked Wild
06. The Palace That Was Found
07. How It Started
08. High And Broken
09. No Way Through
10. Blue On The Run
11. The White Of Sky
12. Unawakening Float
13. It Has Come To This
14. Worth A Chance

■ 「Sonic And The Secret Rings Original Soundtrack Vol.2」

　配信URL： http://itunes.apple.com/jp/album/id555326246

[配信楽曲]
01. The Last Palace
02. Sandstorm
03. Power of The Ring
04. Misgiving
05. Judgment
06. Ali Baba & Sinbad Rescued!
07. Shimmer of Hot Air
08. The Legendary Blue Hedgehog
09. His Fate
10. Shimmer of Hot Air "Heartbeat"
11. King of King
12. The Promise
13. Shimmer of Hot Air "Rage"
14. Miss You
15. Revive
16. Character Select
17. Advertise
18. Party Dress
19. Yellow Sneakers
20. Blue Shirt
21. Violin Beginner's Class
22. Violin Middle Class
23. Violin Higher's Class
24. White Gloves
25. Pull On It!
26. Purple Pants
27. Worth A Chance - Original Version -

■ 「Sonic And The Black Knight Official Soundtrack Vol.1」

　配信URL： http://itunes.apple.com/jp/album/id555285635

[配信楽曲]
01. KNIGHT OF THE WIND -Title ver.-
02. BLACK SWORD IN THE SKY
03. INTO THE STORY OF THE KING ARTHUR
04. MISTY LAKE
05. INTRODUCTION -MERLINA'S REQUEST
06. THE ISLAND OF THE SACRED SWORD
07. THE SACRED SWORD CALIBURN… MEET THE KING ARTHUR
08. FIGHT THE KNIGHT -Strings Mix-
09. A FOOL OF A KNIGHT
10. KNAVE THE HEDGEHOG AND OVERSIZED LETTER OPENER
11. TO THE BLACKSMITH
12. THEME OF MERLINA
13. WORLD MAP -THE LAND RULED BY KING ARTHUR
14. CAMELOT CASTLE
15. TREASURY AND EMBLEM -THE JOURNEY OF CHIVALRY
16. I'M THE BLACKSMITH
17. DEEP WOODS
18. SIR LANCELOT APPEARS
19. THROUGH THE FIRE
20. CALM AFTER THE BATTLE… ARONDIGHT
21. NIMUE… LADY OF THE LIKE
22. THREE DAYS AFTER… ALMOST MAKE IT TO MEET THE DEADLINE
23. TO THE RESCUE… A KNIGHT'S LAW
24. TITANIC PLAIN
25. SIR GAWAIN APPEARS
26. MORE TO BE A KNIGHT THAN TO SERVE YOUR KING
27. CRYSTAL CAVE
28. KNIGHT'S LESSON… A TRUE KNIGHT
29. MOLTEN MINE
30. SIR PERCIVAL… THE KNIGHT OF THE GRAIL
31. SIR SONIC… KNIGHT OF THE WIND
32. HEAD TO AVALON
33. SHOWDOWN WITH KING ARTHUR / KNIGHT OF THE WIND -Instrumental Mix-
34. FIGHT THE KNIGHT
35. GLORY OF VICTORY
36. KNIGHT OF THE WIND

■ 「Sonic And The Black Knight Official Soundtrack Vol.2」

　配信URL： http://itunes.apple.com/jp/album/id555282879

[配信楽曲]
01. KNIGHT OF THE WIND -TGS 2008 Trailer ver.-
02. ORDERS FROM THE ILLUSION
03. MERLINA -HER WICKED SMILE
04. THE END OF THE WORLD
05. ESCAPE FROM THE DESTRUCTION
06. KNIGHT'S PASSAGE
07. FOR THE KINGDOM AND ITS PEOPLE
08. SHROUDED FOREST
09. GREAT MEGALITH
10. THE CAULDRON
11. THE BARRIER
12. DRAGON'S LAIR
13. DRAGON SLAYER
14. INTO THE DARK HOLLOW
15. MERLINA -THE QUEEN OF THE UNDERWORLD
16. IT DOESN'T MATTER
17. TRANSFORM INTO EXCALIBUR SONIC
18. WITH ME feat. Emma & Tinna from ALL ENDS
19. LIVE LIFE
20. DENOUEMENT… TRUE KING ARTHUR
21. THE KING'S PERIL
22. BLACKSMITH
23. BATTLE MENU
24. FARAWAY AVALON
25. STAGE CLEAR
26. RESULT No. 1 -FIVE STARS, AWESOME!
27. RESULT No. 2 -SO, SO… OKAY!
28. RESULT No. 3 - ONE STAR, TRY NEXT TIME
29. THE ASH GROVE -MAIN MENU
30. SYSTEM SCREEN -OPTION
31. SYSTEM SCREEN -RANKING
32. SYSTEM SCREEN -NAME ENTRY
33. SYSTEM SCREEN -GALLARY
34. FAN ART -IT DOESN'T MATTER