diff --git a/public/audio/bgm/abyss.mp3 b/public/audio/bgm/abyss.mp3
index 08882ac7e09..778b2cd77e8 100644
Binary files a/public/audio/bgm/abyss.mp3 and b/public/audio/bgm/abyss.mp3 differ
diff --git a/src/field/arena.ts b/src/field/arena.ts
index c9544c97704..c5e7edae4d8 100644
--- a/src/field/arena.ts
+++ b/src/field/arena.ts
@@ -897,7 +897,7 @@ export class Arena {
       case BiomeId.WASTELAND:
         return 6.336;
       case BiomeId.ABYSS:
-        return 5.13;
+        return 20.113;
       case BiomeId.SPACE:
         return 20.036;
       case BiomeId.CONSTRUCTION_SITE: