diff --git a/agb/src/sound/mixer/sw_mixer.rs b/agb/src/sound/mixer/sw_mixer.rs
index 4915e7a7..26556f97 100644
--- a/agb/src/sound/mixer/sw_mixer.rs
+++ b/agb/src/sound/mixer/sw_mixer.rs
@@ -504,7 +504,7 @@ impl MixerBuffer {
                         for j in i..self.frequency.buffer_size() {
                             // SAFETY: working buffer length = self.frequency.buffer_size()
                             unsafe {
-                                *working_buffer_i32.get_unchecked_mut(j) = 0.into();
+                                *working_buffer_i32.get_unchecked_mut(j) = 0;
                             }
                         }
                     }
diff --git a/tracker/agb-tracker-interop/src/lib.rs b/tracker/agb-tracker-interop/src/lib.rs
index ba7aa5f5..38388b96 100644
--- a/tracker/agb-tracker-interop/src/lib.rs
+++ b/tracker/agb-tracker-interop/src/lib.rs
@@ -114,8 +114,7 @@ impl<'a> quote::ToTokens for Sample<'a> {
             volume,
         } = self;
 
-        let self_as_u8s: Vec<_> = data.iter().map(|i| *i as u8).collect();
-        let samples = ByteString(&self_as_u8s);
+        let samples = ByteString(data);
         let volume = volume.to_raw();
 
         tokens.append_all(quote! {
diff --git a/tracker/agb-tracker/src/lib.rs b/tracker/agb-tracker/src/lib.rs
index 5a05f3ae..35368977 100644
--- a/tracker/agb-tracker/src/lib.rs
+++ b/tracker/agb-tracker/src/lib.rs
@@ -135,10 +135,13 @@ impl Tracker {
 
 impl TrackerChannel {
     fn play_sound(&mut self, mixer: &mut Mixer<'_>, sample: &Sample<'static>) {
-        self.channel_id
+        if let Some(channel) = self
+            .channel_id
             .take()
             .and_then(|channel_id| mixer.channel(&channel_id))
-            .map(|channel| channel.stop());
+        {
+            channel.stop();
+        }
 
         let mut new_channel = SoundChannel::new(sample.data);
 
@@ -158,7 +161,7 @@ impl TrackerChannel {
         if let Some(channel) = self
             .channel_id
             .as_ref()
-            .and_then(|channel_id| mixer.channel(&channel_id))
+            .and_then(|channel_id| mixer.channel(channel_id))
         {
             if speed != 0.into() {
                 self.base_speed = speed;
@@ -172,7 +175,7 @@ impl TrackerChannel {
         if let Some(channel) = self
             .channel_id
             .as_ref()
-            .and_then(|channel_id| mixer.channel(&channel_id))
+            .and_then(|channel_id| mixer.channel(channel_id))
         {
             match effect {
                 PatternEffect::None => {}
diff --git a/tracker/agb-xm-core/src/lib.rs b/tracker/agb-xm-core/src/lib.rs
index f33d0f95..c75d076e 100644
--- a/tracker/agb-xm-core/src/lib.rs
+++ b/tracker/agb-xm-core/src/lib.rs
@@ -14,7 +14,7 @@ use xmrs::{prelude::*, xm::xmmodule::XmModule};
 pub fn agb_xm_core(args: TokenStream) -> TokenStream {
     let input = match syn::parse::<LitStr>(args.into()) {
         Ok(input) => input,
-        Err(err) => return proc_macro2::TokenStream::from(err.to_compile_error()),
+        Err(err) => return err.to_compile_error(),
     };
 
     let filename = input.value();
@@ -61,7 +61,9 @@ pub fn parse_module(module: &Module) -> TokenStream {
     let mut samples = vec![];
 
     for (instrument_index, instrument) in instruments.iter().enumerate() {
-        let InstrumentType::Default(ref instrument) = instrument.instr_type else { continue; };
+        let InstrumentType::Default(ref instrument) = instrument.instr_type else {
+            continue;
+        };
 
         for (sample_index, sample) in instrument.sample.iter().enumerate() {
             let should_loop = !matches!(sample.flags, LoopType::No);
@@ -340,7 +342,7 @@ fn note_to_speed(
 
 fn note_to_frequency_linear(note: Note, fine_tune: f64, relative_note: i8) -> f64 {
     let real_note = (note as usize as f64) + (relative_note as f64);
-    let period = 10.0 * 12.0 * 16.0 * 4.0 - (real_note as f64) * 16.0 * 4.0 - fine_tune / 2.0;
+    let period = 10.0 * 12.0 * 16.0 * 4.0 - real_note * 16.0 * 4.0 - fine_tune / 2.0;
     8363.0 * 2.0f64.powf((6.0 * 12.0 * 16.0 * 4.0 - period) / (12.0 * 16.0 * 4.0))
 }
 
diff --git a/tracker/agb-xm-core/src/main.rs b/tracker/agb-xm-core/src/main.rs
deleted file mode 100644
index 026485eb..00000000
--- a/tracker/agb-xm-core/src/main.rs
+++ /dev/null
@@ -1,8 +0,0 @@
-fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let module = agb_xm_core::load_module_from_file(&std::path::Path::new(
-        "../agb-tracker/examples/final_countdown.xm",
-    ))?;
-    let output = agb_xm_core::parse_module(&module);
-
-    Ok(())
-}