diff --git a/sound/samples/instruments/06_kick_drum_1.aiff b/sound/samples/instruments/06_kick_drum_1.aiff
index 8dc02fc2..c16c2496 100644
Binary files a/sound/samples/instruments/06_kick_drum_1.aiff and b/sound/samples/instruments/06_kick_drum_1.aiff differ
diff --git a/sound/samples/instruments/08.aiff b/sound/samples/instruments/08.aiff
index 4b94cdd1..f6687d44 100644
Binary files a/sound/samples/instruments/08.aiff and b/sound/samples/instruments/08.aiff differ
diff --git a/sound/samples/instruments/0E_hihat_closed.aiff b/sound/samples/instruments/0E_hihat_closed.aiff
index cff5b840..9c0dce48 100644
Binary files a/sound/samples/instruments/0E_hihat_closed.aiff and b/sound/samples/instruments/0E_hihat_closed.aiff differ
diff --git a/sound/samples/instruments/0F_hihat_open.aiff b/sound/samples/instruments/0F_hihat_open.aiff
index 3e22e1f2..17f41db8 100644
Binary files a/sound/samples/instruments/0F_hihat_open.aiff and b/sound/samples/instruments/0F_hihat_open.aiff differ
diff --git a/sound/samples/instruments/10_cymbal_bell.aiff b/sound/samples/instruments/10_cymbal_bell.aiff
index 6aa8a84e..5fa21e9e 100644
Binary files a/sound/samples/instruments/10_cymbal_bell.aiff and b/sound/samples/instruments/10_cymbal_bell.aiff differ
diff --git a/sound/samples/instruments/19_brass_Eb3.aiff b/sound/samples/instruments/19_brass_Eb3.aiff
index 09b7d68a..0fd6031a 100644
Binary files a/sound/samples/instruments/19_brass_Eb3.aiff and b/sound/samples/instruments/19_brass_Eb3.aiff differ
diff --git a/sound/samples/instruments/1A_slap_bass_G#2.aiff b/sound/samples/instruments/1A_slap_bass_G#2.aiff
index a7304b77..fb0d447e 100644
Binary files a/sound/samples/instruments/1A_slap_bass_G#2.aiff and b/sound/samples/instruments/1A_slap_bass_G#2.aiff differ
diff --git a/sound/samples/instruments/1B_percussive_synth_Eb3.aiff b/sound/samples/instruments/1B_percussive_synth_Eb3.aiff
index 81871f9e..5d772119 100644
Binary files a/sound/samples/instruments/1B_percussive_synth_Eb3.aiff and b/sound/samples/instruments/1B_percussive_synth_Eb3.aiff differ
diff --git a/sound/samples/instruments/1C_les_paul_guitar_E2.aiff b/sound/samples/instruments/1C_les_paul_guitar_E2.aiff
index 9ec41ce9..86b55c75 100644
Binary files a/sound/samples/instruments/1C_les_paul_guitar_E2.aiff and b/sound/samples/instruments/1C_les_paul_guitar_E2.aiff differ
diff --git a/sound/samples/instruments/32_metal_rimshot.aiff b/sound/samples/instruments/32_metal_rimshot.aiff
index 78baa24a..e1641090 100644
Binary files a/sound/samples/instruments/32_metal_rimshot.aiff and b/sound/samples/instruments/32_metal_rimshot.aiff differ
diff --git a/sound/samples/instruments/33_kick_drum_2.aiff b/sound/samples/instruments/33_kick_drum_2.aiff
index 48f213d9..159d9bd4 100644
Binary files a/sound/samples/instruments/33_kick_drum_2.aiff and b/sound/samples/instruments/33_kick_drum_2.aiff differ
diff --git a/sound/samples/instruments/42_bowser_hihat.aiff b/sound/samples/instruments/42_bowser_hihat.aiff
index 8846cd89..a21b77d1 100644
Binary files a/sound/samples/instruments/42_bowser_hihat.aiff and b/sound/samples/instruments/42_bowser_hihat.aiff differ
diff --git a/sound/samples/sfx_terrain/02_step_stone.aiff b/sound/samples/sfx_terrain/02_step_stone.aiff
index c3722624..d9988d0f 100644
Binary files a/sound/samples/sfx_terrain/02_step_stone.aiff and b/sound/samples/sfx_terrain/02_step_stone.aiff differ
diff --git a/sound/sequences/jp/02_menu_title_screen.m64 b/sound/sequences/jp/02_menu_title_screen.m64
index bfabccd6..55c2bff1 100644
Binary files a/sound/sequences/jp/02_menu_title_screen.m64 and b/sound/sequences/jp/02_menu_title_screen.m64 differ
diff --git a/sound/sequences/jp/03_level_grass.m64 b/sound/sequences/jp/03_level_grass.m64
index bc65fce5..2dab4ce6 100644
Binary files a/sound/sequences/jp/03_level_grass.m64 and b/sound/sequences/jp/03_level_grass.m64 differ
diff --git a/sound/sound_banks/11.json b/sound/sound_banks/11.json
index fd4c0452..80885bc4 100644
--- a/sound/sound_banks/11.json
+++ b/sound/sound_banks/11.json
@@ -9,7 +9,7 @@
             "hang"
         ],
         "envelope1": [
-            [2, 32700],
+            [1, 32700],
             [1, 32700],
             [32700, 29430],
             "hang"
@@ -83,7 +83,7 @@
     },
     "instruments": {
         "inst0": {
-            "release_rate": 10,
+            "release_rate": 70,
             "envelope": "envelope1",
             "sound": "08"   
         },
@@ -108,7 +108,7 @@
             "sound": "19_brass_Eb3"
         },
         "inst5": {
-            "release_rate": 208,
+            "release_rate": 88,
             "envelope": "envelope5",
             "sound": "1A_slap_bass_G#2"
         },
@@ -123,26 +123,26 @@
             "sound": "1C_les_paul_guitar_E2"
         },
         "percussion": [
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.735784}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.77953575}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.82589}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.875}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.926031}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.98215425}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.040557}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.10243175}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.168985}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.23743725}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.3110195}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.38997675}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.47156975}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.55807325}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.65178125}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.75}},
-            {"release_rate": 10, "pan": 57, "envelope": "envelope8", "sound": "07_rimshot"},
-            {"release_rate": 10, "pan": 65, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 1.3205508}},
-            {"release_rate": 10, "pan": 66, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 1.0219052}},
-            {"release_rate": 10, "pan": 66, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 0.9718465}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.735784}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.77953575}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.82589}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.875}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.926031}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 0.98215425}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.040557}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.10243175}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.168985}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.23743725}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.3110195}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.38997675}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.47156975}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.55807325}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.65178125}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope8", "sound": {"sample": "06_kick_drum_1", "tuning": 1.75}},
+            {"release_rate": 60, "pan": 57, "envelope": "envelope8", "sound": "07_rimshot"},
+            {"release_rate": 70, "pan": 65, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 1.3205508}},
+            {"release_rate": 70, "pan": 66, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 1.0219052}},
+            {"release_rate": 70, "pan": 66, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 0.9718465}},
             {"release_rate": 10, "pan": 6, "envelope": "envelope8", "sound": {"sample": "09", "tuning": 0.471937}},
             {"release_rate": 10, "pan": 6, "envelope": "envelope8", "sound": {"sample": "09", "tuning": 0.5}},
             {"release_rate": 10, "pan": 27, "envelope": "envelope8", "sound": {"sample": "09", "tuning": 0.66742}},
@@ -227,9 +227,14 @@
             "sound": "4B"
         },
         "inst14": {
-            "release_rate": 1,
+            "release_rate": 208,
             "envelope": "envelope0",
             "sound": "4C"
+        },
+         "inst15": {
+            "release_rate": 0,
+            "envelope": "envelope0",
+            "sound": "42_bowser_hihat"
         }
     },
     "instrument_list": [/* the 'null' instruments in this soundbank were 
@@ -251,6 +256,7 @@
         "inst11",
         "inst12",
         "inst13",
-        "inst14"
+        "inst14",
+        "inst15"
     ]
 }
diff --git a/sound/sound_banks/12.json b/sound/sound_banks/12.json
index d218754b..d9b66167 100644
--- a/sound/sound_banks/12.json
+++ b/sound/sound_banks/12.json
@@ -78,9 +78,9 @@
             "normal_range_lo": 14,
             "normal_range_hi": 15,
             "envelope": "envelope3",
-            "sound_lo": {"sample": "32_metal_rimshot", "tuning": 2.244924},
+            "sound_lo": { "sample": "32_metal_rimshot", "tuning": 2.6939088 },
             "sound": "33_kick_drum_2",
-            "sound_hi": {"sample": "32_metal_rimshot", "tuning": 3}
+            "sound_hi": { "sample": "32_metal_rimshot", "tuning": 3.6 }
         },
         "inst4": {
             "release_rate": 10,
diff --git a/sound/sound_banks/22.json b/sound/sound_banks/22.json
index f99c76be..587998b2 100644
--- a/sound/sound_banks/22.json
+++ b/sound/sound_banks/22.json
@@ -47,46 +47,46 @@
     },
     "instruments": {
         "inst0": {
-            "release_rate": 255,
+            "release_rate": 208,
             "envelope": "envelope0",
             "sound": "19_brass_Eb3"
         },
         "inst1": {
-            "release_rate": 255,
+            "release_rate": 208,
             "envelope": "envelope1",
             "sound": "1A_slap_bass_G#2"
         },
         "inst2": {
-            "release_rate": 255,
+            "release_rate": 128,
             "envelope": "envelope2",
             "sound": "1B_percussive_synth_Eb3"
         },
         "inst3": {
-            "release_rate": 255,
+            "release_rate": 208,
             "envelope": "envelope3",
             "sound": "1C_les_paul_guitar_E2"
         },
         "percussion": [
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.735784}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.77953575}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.82588975}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.875}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.926031}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.98215425}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.040557}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.10243175}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.167985}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.23743725}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.3110195}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.38897675}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.47156975}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.55907325}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.65178125}},
-            {"release_rate": 10, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.75}},
-            {"release_rate": 10, "pan": 57, "envelope": "envelope4", "sound": "07_rimshot"},
-            {"release_rate": 10, "pan": 65, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 4.621928}},
-            {"release_rate": 10, "pan": 66, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 3.40146275}},
-            {"release_rate": 10, "pan": 66, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 3.5766682}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.735784}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.77953575}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.82588975}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.875}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.926031}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 0.98215425}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.040557}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.10243175}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.167985}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.23743725}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.3110195}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.38897675}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.47156975}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.55907325}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.65178125}},
+            {"release_rate": 70, "pan": 62, "envelope": "envelope4", "sound": {"sample": "06_kick_drum_1", "tuning": 1.75}},
+            {"release_rate": 60, "pan": 57, "envelope": "envelope4", "sound": "07_rimshot"},
+            {"release_rate": 70, "pan": 65, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 2.310964}},
+            {"release_rate": 70, "pan": 66, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 1.700731375}},
+            {"release_rate": 70, "pan": 66, "envelope": "envelope4", "sound": {"sample": "08", "tuning": 1.7883341}},
             {"release_rate": 10, "pan": 6, "envelope": "envelope4", "sound": {"sample": "09", "tuning": 0.471937}},
             {"release_rate": 10, "pan": 6, "envelope": "envelope4", "sound": {"sample": "09", "tuning": 0.5}},
             {"release_rate": 10, "pan": 27, "envelope": "envelope4", "sound": {"sample": "09", "tuning": 0.66742}},
@@ -133,14 +133,14 @@
             {"release_rate": 10, "pan": 128, "envelope": "envelope4", "sound": "0D_clave"}
         ],
         "inst4": {
-            "release_rate":150,
+            "release_rate": 208,
             "normal_range_lo": 24,
             "envelope": "envelope5",
             "sound_lo": "0E_hihat_closed",
             "sound": "0F_hihat_open"
         },
         "inst5": {
-            "release_rate": 3,
+            "release_rate": 10,
             "normal_range_lo": 28,
             "normal_range_hi": 28,
             "envelope": "envelope6",
diff --git a/src/audio/external.c b/src/audio/external.c
index ab7d7e51..3cd0783f 100644
--- a/src/audio/external.c
+++ b/src/audio/external.c
@@ -235,7 +235,7 @@ u8 sBackgroundMusicDefaultVolume[] = {
     127, // SEQ_SOUND_PLAYER
     80,  // SEQ_EVENT_CUTSCENE_COLLECT_STAR
     80,  // SEQ_MENU_TITLE_SCREEN
-    75,  // SEQ_LEVEL_GRASS
+    80,  // SEQ_LEVEL_GRASS
     70,  // SEQ_LEVEL_INSIDE_CASTLE
     75,  // SEQ_LEVEL_WATER
     75,  // SEQ_LEVEL_HOT