diff --git a/src/samples/ghhb_game.h b/src/samples/ghhb_game.h
index 7fca2b0..030970a 100644
--- a/src/samples/ghhb_game.h
+++ b/src/samples/ghhb_game.h
@@ -16,7 +16,9 @@ namespace
 {
 constexpr int LANE_COUNT = 12;
 constexpr int OCTAVE_COUNT = 3;
-constexpr int OCTAVE_OFFSET = 48;
+constexpr int MIDI_LANE_MIN = 48;
+constexpr int MIDI_LANE_MAX = 83;
+constexpr int MIDI_LANE_COUNT = MIDI_LANE_MAX - MIDI_LANE_MIN + 1;
 constexpr int MAX_GAMEPADS = 4;
 constexpr int MAX_INSTRUMENT_TYPES = MAX_GAMEPADS;
 constexpr float RECEPTOR_HEIGHT = 150.0f;
@@ -26,7 +28,7 @@ constexpr float SCROLL_PX_PER_SEC = 350.0f;
 constexpr float LEAD_OFFSET_SECONDS = 3.0f;
 constexpr float GLYPH_HEIGHT_FRACTION_OF_LANE = 0.5f;
 constexpr float MIN_SUSTAIN_FALLBACK_SEC = 0.05f;
-constexpr float MIN_GLYPH_DURATION_SEC = 0.05f;
+constexpr float MIN_GLYPH_DURATION_SEC = 0.1f;
 
 const int GAMEPAD_BUTTONS[LANE_COUNT] = {
     GAMEPAD_BUTTON_LEFT_FACE_LEFT, // Left
@@ -87,7 +89,8 @@ const float INSTRUMENT_VOLUME[MAX_INSTRUMENT_TYPES] = {
     0.6f
 };
 
-const char* const INSTRUMENT_LANE_WAV[MAX_INSTRUMENT_TYPES][LANE_COUNT * OCTAVE_COUNT] {
+/* Index i = MIDI note (48 + i); notes outside [48, 83] are not rendered. */
+const char* const INSTRUMENT_LANE_WAV[MAX_INSTRUMENT_TYPES][MIDI_LANE_COUNT] {
     { // Instrument 0 - Synth
         "assets/sounds/snes_synth/snes_synth_048.wav", "assets/sounds/snes_synth/snes_synth_049.wav",
         "assets/sounds/snes_synth/snes_synth_050.wav", "assets/sounds/snes_synth/snes_synth_051.wav",
@@ -242,7 +245,7 @@ std::vector<Glyph> chart_from_song(const Song& song, int track_override)
     std::vector<std::pair<int, const Note*>> timed_notes;
     for (const Note& note : track.notes)
     {
-        if (note.midi >= 0 && note.midi <= 127)
+        if (note.midi >= MIDI_LANE_MIN && note.midi <= MIDI_LANE_MAX)
             timed_notes.push_back({note.ticks, &note});
     }
     std::sort(timed_notes.begin(), timed_notes.end(),
@@ -258,11 +261,9 @@ std::vector<Glyph> chart_from_song(const Song& song, int track_override)
         const Note& note = *pair.second;
         float time_sec = note.ticks / ticks_per_sec;  // This is now the BOTTOM time
         float duration_sec = note.duration_ticks / ticks_per_sec;
-        int lane = note.midi % LANE_COUNT;
-        int offset = 0;
-        if (note.midi >= OCTAVE_OFFSET)
-            offset = OCTAVE_OFFSET;
-        int octave = (note.midi - offset) % (LANE_COUNT * OCTAVE_COUNT);
+        int wav_index = note.midi - MIDI_LANE_MIN;
+        int lane = wav_index % LANE_COUNT;
+        int octave = wav_index;
         int instrument_slot = note_index % MAX_INSTRUMENT_TYPES;
 
         // Log original glyph timing (time is bottom, time + duration is top)
@@ -356,8 +357,8 @@ public:
     float lane_width = 0.0f;
     float screen_width = 0.0f;
     float screen_height = 0.0f;
-    Sound note_sounds[MAX_INSTRUMENT_TYPES][LANE_COUNT * OCTAVE_COUNT] = {{0}};
-    bool note_sounds_loaded[MAX_INSTRUMENT_TYPES][LANE_COUNT * OCTAVE_COUNT] = {{false}};
+    Sound note_sounds[MAX_INSTRUMENT_TYPES][MIDI_LANE_COUNT] = {{0}};
+    bool note_sounds_loaded[MAX_INSTRUMENT_TYPES][MIDI_LANE_COUNT] = {{false}};
     std::deque<Sound> note_sounds_playing[LANE_COUNT][MAX_INSTRUMENT_TYPES];
     static constexpr float PRESS_FLASH_DURATION = 0.12f;
     float press_flash_timer[LANE_COUNT] = {0};
@@ -424,7 +425,7 @@ public:
         }
         for (int slot = 0; slot < MAX_INSTRUMENT_TYPES; slot++)
         {
-            for (int lane = 0; lane < LANE_COUNT * OCTAVE_COUNT; lane++)
+            for (int lane = 0; lane < MIDI_LANE_COUNT; lane++)
             {
                 if (note_sounds_loaded[slot][lane])
                 {
@@ -445,7 +446,7 @@ public:
         update_layout();
         for (int slot = 0; slot < MAX_INSTRUMENT_TYPES; slot++)
         {
-            for (int lane = 0; lane < LANE_COUNT * OCTAVE_COUNT; lane++)
+            for (int lane = 0; lane < MIDI_LANE_COUNT; lane++)
             {
                 const char* path = INSTRUMENT_LANE_WAV[slot][lane];
                 if (FileExists(path))
diff --git a/src/samples/instrument_select.h b/src/samples/instrument_select.h
index b270ce2..dd0a341 100644
--- a/src/samples/instrument_select.h
+++ b/src/samples/instrument_select.h
@@ -32,9 +32,9 @@ public:
 
     static constexpr const char* INSTRUMENT_IMAGE_PATHS[MAX_INSTRUMENT_TYPES] = {
         "assets/instruments/guitar.png",
-        "assets/instruments/piano.png",
-        "assets/instruments/violin.png",
         "assets/instruments/sax.png",
+        "assets/instruments/violin.png",
+        "assets/instruments/piano.png",
     };
 
     std::array<int, MAX_INSTRUMENT_TYPES> instrument_owner = {-1, -1, -1, -1};
diff --git a/src/samples/title_screen.h b/src/samples/title_screen.h
index e69dd8e..8c9a9f0 100644
--- a/src/samples/title_screen.h
+++ b/src/samples/title_screen.h
@@ -15,11 +15,14 @@ public:
 
     void update(float delta_time) override
     {
-        // Trigger scene change on Enter key or gamepad start button.
-        if (IsKeyPressed(KEY_ENTER) || IsGamepadButtonPressed(0, GAMEPAD_BUTTON_MIDDLE_RIGHT))
+        bool start = IsKeyPressed(KEY_ENTER);
+        for (int gp = 0; gp < 4; gp++)
         {
-            game->go_to_scene("song_select");
+            if (IsGamepadAvailable(gp) && IsGamepadButtonPressed(gp, GAMEPAD_BUTTON_MIDDLE_RIGHT))
+                start = true;
         }
+        if (start)
+            game->go_to_scene("song_select");
     }
 
     void draw() override