diff --git a/src/samples/ghhb_game.h b/src/samples/ghhb_game.h
index 3de67bf..517246b 100644
--- a/src/samples/ghhb_game.h
+++ b/src/samples/ghhb_game.h
@@ -79,6 +79,13 @@ const Color INSTRUMENT_COLORS[MAX_INSTRUMENT_TYPES] = {
     {255, 200, 80, 255}, // yellow
 };
 
+const float INSTRUMENT_VOLUME[MAX_INSTRUMENT_TYPES] = {
+    0.4f,
+    0.6f,
+    1.0f,
+    0.7f
+};
+
 const char* const INSTRUMENT_LANE_WAV[MAX_INSTRUMENT_TYPES][LANE_COUNT * OCTAVE_COUNT] {
     { // Instrument 0 - Synth
         "assets/sounds/snes_synth/snes_synth_048.wav", "assets/sounds/snes_synth/snes_synth_049.wav",
@@ -649,6 +656,7 @@ public:
             if (song_time >= it->play_time)
             {
                 Sound s = note_sounds[it->instrument_slot][it->octave];
+                SetSoundVolume(s, INSTRUMENT_VOLUME[it->instrument_slot]);
                 PlaySound(s);
                 note_sounds_playing[it->lane][it->instrument_slot].push_back(s);
                 float sustain_sec = std::max(it->duration_sec, time_per_glyph_height);