diff --git a/agb/examples/i-will-not-let-you-let-me-down.raw b/agb/examples/i-will-not-let-you-let-me-down.raw
index 9ebfb041..cc272fad 100644
Binary files a/agb/examples/i-will-not-let-you-let-me-down.raw and b/agb/examples/i-will-not-let-you-let-me-down.raw differ
diff --git a/agb/examples/mixer_basic.rs b/agb/examples/mixer_basic.rs
index c5923f2f..37b8c285 100644
--- a/agb/examples/mixer_basic.rs
+++ b/agb/examples/mixer_basic.rs
@@ -15,7 +15,7 @@ pub fn main() -> ! {
     let mixer = gba.mixer;
     mixer.enable();
 
-    mixer.play_sound_starting_at(&I_WILL_NOT_LET_YOU_LET_ME_DOWN[0], 8000);
+    mixer.play_sound_starting_at(&I_WILL_NOT_LET_YOU_LET_ME_DOWN[0]);
 
     loop {}
 }
diff --git a/agb/src/sound/mixer.rs b/agb/src/sound/mixer.rs
index 72aec10e..52aea0f6 100644
--- a/agb/src/sound/mixer.rs
+++ b/agb/src/sound/mixer.rs
@@ -12,12 +12,14 @@ impl Mixer {
         set_sound_control_register_for_mixer();
     }
 
-    pub fn play_sound_starting_at(&self, sound_memory: *const u8, frequency: i32) {
-        set_timer_counter_for_frequency_and_enable(frequency);
+    pub fn play_sound_starting_at(&self, sound_memory: *const u8) {
+        set_timer_counter_for_frequency_and_enable(SOUND_FREQUENCY);
         enable_dma1_for_sound(sound_memory);
     }
 }
 
+const SOUND_FREQUENCY: i32 = 10512;
+
 // Once we have proper DMA support, we should use that rather than hard coding these here too
 const DMA1_SOURCE_ADDR: MemoryMapped<u32> = unsafe { MemoryMapped::new(0x0400_00bc) };
 const DMA1_DEST_ADDR: MemoryMapped<u32> = unsafe { MemoryMapped::new(0x0400_00c0) };