diff --git a/src/audio.rs b/src/audio.rs
index 5c862d1..3dcd08b 100644
--- a/src/audio.rs
+++ b/src/audio.rs
@@ -1,128 +1,128 @@
-use rodio::{Decoder, DeviceTrait, OutputStream, OutputStreamHandle, Source};
-use std::{
-    fs::File,
-    io::BufReader,
-    sync::{
-        atomic::{AtomicBool, Ordering},
-        Arc,
-    },
-    time::Duration,
-};
-
-pub struct OutputDevice {
-    device: rodio::Device,
-    name: String,
-    enabled: bool,
-    stream: Option<OutputStream>,
-    stream_handle: Option<OutputStreamHandle>,
-}
-
-impl OutputDevice {
-    pub fn new(device: rodio::Device) -> Self {
-        Self {
-            name: device.name().unwrap_or_else(|_| "[Unknown]".to_string()),
-            device,
-            enabled: false,
-            stream: None,
-            stream_handle: None,
-        }
-    }
-
-    /// Create [`OutputStream`] and [`OutputStreamHandle`].
-    pub fn enable(&mut self) {
-        // Do nothing if already enabled.
-        if self.enabled {
-            return;
-        }
-
-        match OutputStream::try_from_device(&self.device) {
-            Err(error) => {
-                println!(
-                    "[Audio] Unable to build an output stream from device {}: {error}.",
-                    self.name
-                );
-                self.enabled = false;
-            }
-            Ok((stream, stream_handle)) => {
-                self.stream = Some(stream);
-                self.stream_handle = Some(stream_handle);
-                self.enabled = true;
-            }
-        }
-    }
-
-    /// Drop [`OutputStream`] and [`OutputStreamHandle`].
-    pub fn disable(&mut self) {
-        // Do nothing if not enabled.
-        if !self.enabled {
-            return;
-        }
-
-        // Drop stream_handle and stream.
-        drop(self.stream_handle.take());
-        drop(self.stream.take());
-        self.enabled = false;
-    }
-
-    /// Return self.enabled.
-    #[inline]
-    pub fn enabled(&self) -> bool {
-        self.enabled
-    }
-
-    /// Return &self.name.
-    #[inline]
-    pub fn name(&self) -> &String {
-        &self.name
-    }
-
-    /// Play the audio file at `filename`.
-    pub fn play_sound(&mut self, filename: &str) -> Option<Arc<AtomicBool>> {
-        // Do nothing if not enabled.
-        if !self.enabled {
-            return None;
-        }
-
-        // Load audio file.
-        let file = BufReader::new(match File::open(filename) {
-            Err(error) => {
-                println!("[Audio] Unable to read file {filename}: {error}.");
-                return None;
-            }
-            Ok(file) => file,
-        });
-
-        // Decode file and setup audio pipeline.
-        let stop = Arc::new(AtomicBool::new(false));
-        let stop_clone = stop.clone();
-        let source = match Decoder::new(file) {
-            Err(error) => {
-                println!("[Audio] Unable to decode file {filename}: {error}.");
-                return None;
-            }
-            Ok(source) => source,
-        }
-        .convert_samples()
-        .stoppable()
-        .periodic_access(Duration::from_millis(200), move |src| {
-            // Stop the sound if the [`AtomicBool`] returned from `play_sound` is set to false.
-            if stop.load(Ordering::SeqCst) {
-                src.stop()
-            }
-        });
-
-        // Play audio.
-        match self
-            .stream_handle
-            .as_ref()
-            .expect("self.stream_handle is None when self.enabled is true")
-            .play_raw(source)
-        {
-            Ok(()) => Some(stop_clone),
-            Err(error) => {
-                println!("[Audio] Unable to play {filename}: {error}.");
-                None
-            }
-        }
-    }
-}
+use rodio::{Decoder, DeviceTrait, OutputStream, OutputStreamHandle, Source};
+use std::{
+    fs::File,
+    io::BufReader,
+    sync::{
+        atomic::{AtomicBool, Ordering},
+        Arc,
+    },
+    time::Duration,
+};
+
+pub struct OutputDevice {
+    device: rodio::Device,
+    name: String,
+    enabled: bool,
+    stream: Option<OutputStream>,
+    stream_handle: Option<OutputStreamHandle>,
+}
+
+impl OutputDevice {
+    pub fn new(device: rodio::Device) -> Self {
+        Self {
+            name: device.name().unwrap_or_else(|_| "[Unknown]".to_string()),
+            device,
+            enabled: false,
+            stream: None,
+            stream_handle: None,
+        }
+    }
+
+    /// Create [`OutputStream`] and [`OutputStreamHandle`].
+    pub fn enable(&mut self) {
+        // Do nothing if already enabled.
+        if self.enabled {
+            return;
+        }
+
+        match OutputStream::try_from_device(&self.device) {
+            Err(error) => {
+                println!(
+                    "[Audio] Unable to build an output stream from device {}: {error}.",
+                    self.name
+                );
+                self.enabled = false;
+            }
+            Ok((stream, stream_handle)) => {
+                self.stream = Some(stream);
+                self.stream_handle = Some(stream_handle);
+                self.enabled = true;
+            }
+        }
+    }
+
+    /// Drop [`OutputStream`] and [`OutputStreamHandle`].
+    pub fn disable(&mut self) {
+        // Do nothing if not enabled.
+        if !self.enabled {
+            return;
+        }
+
+        // Drop stream_handle and stream.
+        drop(self.stream_handle.take());
+        drop(self.stream.take());
+        self.enabled = false;
+    }
+
+    /// Return self.enabled.
+    #[inline]
+    pub fn enabled(&self) -> bool {
+        self.enabled
+    }
+
+    /// Return &self.name.
+    #[inline]
+    pub fn name(&self) -> &String {
+        &self.name
+    }
+
+    /// Play the audio file at `filename`.
+    pub fn play_sound(&mut self, filename: &str) -> Option<Arc<AtomicBool>> {
+        // Do nothing if not enabled.
+        if !self.enabled {
+            return None;
+        }
+
+        // Load audio file.
+        let file = BufReader::new(match File::open(filename) {
+            Err(error) => {
+                println!("[Audio] Unable to read file {filename}: {error}.");
+                return None;
+            }
+            Ok(file) => file,
+        });
+
+        // Decode file and setup audio pipeline.
+        let stop = Arc::new(AtomicBool::new(false));
+        let stop_clone = stop.clone();
+        let source = match Decoder::new(file) {
+            Err(error) => {
+                println!("[Audio] Unable to decode file {filename}: {error}.");
+                return None;
+            }
+            Ok(source) => source,
+        }
+        .convert_samples()
+        .stoppable()
+        .periodic_access(Duration::from_millis(200), move |src| {
+            // Stop the sound if the [`AtomicBool`] returned from `play_sound` is set to false.
+            if stop.load(Ordering::SeqCst) {
+                src.stop()
+            }
+        });
+
+        // Play audio.
+        match self
+            .stream_handle
+            .as_ref()
+            .expect("self.stream_handle is None when self.enabled is true")
+            .play_raw(source)
+        {
+            Ok(()) => Some(stop_clone),
+            Err(error) => {
+                println!("[Audio] Unable to play {filename}: {error}.");
+                None
+            }
+        }
+    }
+}