diff --git a/gb-emu/src/audio.rs b/gb-emu/src/audio.rs
new file mode 100644
index 0000000..332b5b3
--- /dev/null
+++ b/gb-emu/src/audio.rs
@@ -0,0 +1,52 @@
+use cpal::{
+    traits::{DeviceTrait, HostTrait, StreamTrait},
+    Stream,
+};
+use futures::executor;
+use gb_emu_lib::connect::{AudioOutput, DownsampleType};
+
+const FRAMES_TO_BUFFER: usize = 1;
+const DOWNSAMPLE_TYPE: DownsampleType = DownsampleType::ZeroOrderHold;
+
+pub fn create_output() -> (AudioOutput, Stream) {
+    let host = cpal::default_host();
+
+    let device = host
+        .default_output_device()
+        .expect("no output device available");
+
+    let mut supported_configs_range = device
+        .supported_output_configs()
+        .expect("error while querying configs");
+    let config = supported_configs_range
+        .next()
+        .expect("no supported config?!")
+        .with_max_sample_rate();
+
+    let sample_rate = config.sample_rate().0;
+
+    let (output, mut rx) =
+        AudioOutput::new(sample_rate as f32, true, FRAMES_TO_BUFFER, DOWNSAMPLE_TYPE);
+
+    let stream = device
+        .build_output_stream(
+            &config.config(),
+            move |data: &mut [f32], _info: &cpal::OutputCallbackInfo| {
+                for v in data.chunks_exact_mut(2) {
+                    match executor::block_on(rx.pop()) {
+                        Some(a) => v.copy_from_slice(&a),
+                        None => panic!("Audio queue disconnected!"),
+                    }
+                }
+            },
+            move |err| {
+                // react to errors here.
+                println!("audio error: {err}");
+            },
+            None,
+        )
+        .unwrap();
+    stream.play().unwrap();
+
+    (output, stream)
+}
diff --git a/gb-emu/src/main.rs b/gb-emu/src/main.rs
index ad67865..37942c1 100644
--- a/gb-emu/src/main.rs
+++ b/gb-emu/src/main.rs
@@ -1,26 +1,18 @@
 #![feature(let_chains)]
 
-use std::sync::mpsc::channel;
-
 use clap::{ArgGroup, Parser};
-use cpal::{
-    traits::{DeviceTrait, HostTrait, StreamTrait},
-    Stream,
-};
-use futures::executor;
+
 use gb_emu_lib::{
-    connect::{
-        AudioOutput, DownsampleType, EmulatorMessage, EmulatorOptions, JoypadState, Renderer,
-        RomFile, SerialTarget,
-    },
-    util::scale_buffer,
+    connect::{EmulatorMessage, EmulatorOptions, RomFile, SerialTarget},
     EmulatorCore,
 };
-use gilrs::{
-    ff::{BaseEffect, BaseEffectType, EffectBuilder, Replay, Ticks},
-    Button, Gilrs,
-};
-use minifb::{Key, Window, WindowOptions};
+use gilrs::Gilrs;
+
+use std::sync::mpsc::channel;
+use window::WindowRenderer;
+
+mod audio;
+mod window;
 
 /// Gameboy (DMG-A/B/C) emulator
 #[derive(Parser, Debug)]
@@ -88,7 +80,7 @@ fn main() {
 
     ctrlc::set_handler(move || sender.send(EmulatorMessage::Stop).unwrap()).unwrap();
 
-    let (output, _stream) = create_audio_output();
+    let (output, _stream) = audio::create_output();
 
     let options = EmulatorOptions::new(
         WindowRenderer::new(factor, Some(Gilrs::new().unwrap())),
@@ -117,188 +109,3 @@ fn main() {
         },
     }
 }
-
-const FRAMES_TO_BUFFER: usize = 1;
-const DOWNSAMPLE_TYPE: DownsampleType = DownsampleType::ZeroOrderHold;
-
-fn create_audio_output() -> (AudioOutput, Stream) {
-    let host = cpal::default_host();
-
-    let device = host
-        .default_output_device()
-        .expect("no output device available");
-
-    let mut supported_configs_range = device
-        .supported_output_configs()
-        .expect("error while querying configs");
-    let config = supported_configs_range
-        .next()
-        .expect("no supported config?!")
-        .with_max_sample_rate();
-
-    let sample_rate = config.sample_rate().0;
-
-    let (output, mut rx) =
-        AudioOutput::new(sample_rate as f32, true, FRAMES_TO_BUFFER, DOWNSAMPLE_TYPE);
-
-    let stream = device
-        .build_output_stream(
-            &config.config(),
-            move |data: &mut [f32], _info: &cpal::OutputCallbackInfo| {
-                for v in data.chunks_exact_mut(2) {
-                    match executor::block_on(rx.pop()) {
-                        Some(a) => v.copy_from_slice(&a),
-                        None => panic!("Audio queue disconnected!"),
-                    }
-                }
-            },
-            move |err| {
-                // react to errors here.
-                println!("audio error: {err}");
-            },
-            None,
-        )
-        .unwrap();
-    stream.play().unwrap();
-
-    (output, stream)
-}
-
-struct WindowRenderer {
-    window: Option<Window>,
-    scaled_buf: Vec<u32>,
-    width: usize,
-    height: usize,
-    factor: usize,
-    gamepad_handler: Option<Gilrs>,
-    joypad_state: JoypadState,
-    current_rumble: bool,
-}
-
-impl WindowRenderer {
-    fn new(factor: usize, gamepad_handler: Option<Gilrs>) -> Self {
-        Self {
-            window: None,
-            scaled_buf: vec![],
-            width: 0,
-            height: 0,
-            factor,
-            gamepad_handler,
-            joypad_state: JoypadState::default(),
-            current_rumble: false,
-        }
-    }
-}
-
-impl Renderer<u32> for WindowRenderer {
-    fn prepare(&mut self, width: usize, height: usize) {
-        self.width = width;
-        self.height = height;
-        self.window = Some(
-            Window::new(
-                "Gameboy",
-                width * self.factor,
-                height * self.factor,
-                WindowOptions::default(),
-            )
-            .unwrap(),
-        );
-    }
-
-    fn display(&mut self, buffer: &[u32]) {
-        if let Some(ref mut window) = self.window {
-            self.scaled_buf = scale_buffer(buffer, self.width, self.height, self.factor);
-            window
-                .update_with_buffer(
-                    &self.scaled_buf,
-                    self.width * self.factor,
-                    self.height * self.factor,
-                )
-                .unwrap();
-        }
-    }
-
-    fn set_title(&mut self, title: String) {
-        if let Some(ref mut window) = self.window {
-            window.set_title(&title);
-        }
-    }
-
-    fn latest_joypad_state(&mut self) -> JoypadState {
-        self.joypad_state.reset();
-
-        if let Some(ref mut gamepad_handler) = self.gamepad_handler {
-            while let Some(event) = gamepad_handler.next_event() {
-                if let gilrs::EventType::ButtonPressed(button, _) = event.event {
-                    match button {
-                        Button::DPadDown => self.joypad_state.down = true,
-                        Button::DPadUp => self.joypad_state.up = true,
-                        Button::DPadLeft => self.joypad_state.left = true,
-                        Button::DPadRight => self.joypad_state.right = true,
-                        Button::Start => self.joypad_state.start = true,
-                        Button::Select => self.joypad_state.select = true,
-                        Button::East => self.joypad_state.a = true,
-                        Button::South => self.joypad_state.b = true,
-                        _ => {}
-                    }
-                }
-            }
-
-            for (_, pad) in gamepad_handler.gamepads() {
-                self.joypad_state.down |= pad.is_pressed(Button::DPadDown);
-                self.joypad_state.up |= pad.is_pressed(Button::DPadUp);
-                self.joypad_state.left |= pad.is_pressed(Button::DPadLeft);
-                self.joypad_state.right |= pad.is_pressed(Button::DPadRight);
-                self.joypad_state.start |= pad.is_pressed(Button::Start);
-                self.joypad_state.select |= pad.is_pressed(Button::Select);
-                self.joypad_state.a |= pad.is_pressed(Button::East);
-                self.joypad_state.b |= pad.is_pressed(Button::South);
-            }
-        }
-
-        if let Some(window) = &self.window {
-            let keys = window.get_keys();
-
-            self.joypad_state.down |= keys.contains(&Key::Down) || keys.contains(&Key::S);
-            self.joypad_state.up |= keys.contains(&Key::Up) || keys.contains(&Key::W);
-            self.joypad_state.left |= keys.contains(&Key::Left) || keys.contains(&Key::A);
-            self.joypad_state.right |= keys.contains(&Key::Right) || keys.contains(&Key::D);
-            self.joypad_state.start |= keys.contains(&Key::Equal);
-            self.joypad_state.select |= keys.contains(&Key::Minus);
-            self.joypad_state.a |= keys.contains(&Key::Apostrophe);
-            self.joypad_state.b |= keys.contains(&Key::Semicolon);
-        }
-
-        self.joypad_state
-    }
-
-    fn set_rumble(&mut self, rumbling: bool) {
-        if rumbling != self.current_rumble && let Some(ref mut gamepad_handler) = self.gamepad_handler {
-            self.current_rumble = rumbling;
-
-            let ids = gamepad_handler
-                .gamepads()
-                .filter_map(|(id, gp)| if gp.is_ff_supported() { Some(id) } else { None })
-                .collect::<Vec<_>>();
-            if ids.is_empty() {
-                return;
-            }
-
-            let magnitude = if rumbling { 0xFF } else { 0x0 };
-
-            EffectBuilder::new()
-                .add_effect(BaseEffect {
-                    kind: BaseEffectType::Strong { magnitude },
-                    scheduling: Replay {
-                        after: Ticks::from_ms(0),
-                        play_for: Ticks::from_ms(16),
-                        with_delay: Ticks::from_ms(0),
-                    },
-                    envelope: Default::default(),
-                })
-                .gamepads(&ids)
-                .finish(gamepad_handler)
-                .unwrap();
-        }
-    }
-}
diff --git a/gb-emu/src/window.rs b/gb-emu/src/window.rs
new file mode 100644
index 0000000..01297f3
--- /dev/null
+++ b/gb-emu/src/window.rs
@@ -0,0 +1,148 @@
+use gb_emu_lib::{
+    connect::{JoypadState, Renderer},
+    util::scale_buffer,
+};
+use gilrs::{
+    ff::{BaseEffect, BaseEffectType, EffectBuilder, Replay, Ticks},
+    Button, Gilrs,
+};
+use minifb::{Key, Window, WindowOptions};
+
+pub struct WindowRenderer {
+    window: Option<Window>,
+    scaled_buf: Vec<u32>,
+    width: usize,
+    height: usize,
+    factor: usize,
+    gamepad_handler: Option<Gilrs>,
+    joypad_state: JoypadState,
+    current_rumble: bool,
+}
+
+impl WindowRenderer {
+    pub fn new(factor: usize, gamepad_handler: Option<Gilrs>) -> Self {
+        Self {
+            window: None,
+            scaled_buf: vec![],
+            width: 0,
+            height: 0,
+            factor,
+            gamepad_handler,
+            joypad_state: JoypadState::default(),
+            current_rumble: false,
+        }
+    }
+}
+
+impl Renderer<u32> for WindowRenderer {
+    fn prepare(&mut self, width: usize, height: usize) {
+        self.width = width;
+        self.height = height;
+        self.window = Some(
+            Window::new(
+                "Gameboy",
+                width * self.factor,
+                height * self.factor,
+                WindowOptions::default(),
+            )
+            .unwrap(),
+        );
+    }
+
+    fn display(&mut self, buffer: &[u32]) {
+        if let Some(ref mut window) = self.window {
+            self.scaled_buf = scale_buffer(buffer, self.width, self.height, self.factor);
+            window
+                .update_with_buffer(
+                    &self.scaled_buf,
+                    self.width * self.factor,
+                    self.height * self.factor,
+                )
+                .unwrap();
+        }
+    }
+
+    fn set_title(&mut self, title: String) {
+        if let Some(ref mut window) = self.window {
+            window.set_title(&title);
+        }
+    }
+
+    fn latest_joypad_state(&mut self) -> JoypadState {
+        self.joypad_state.reset();
+
+        if let Some(ref mut gamepad_handler) = self.gamepad_handler {
+            while let Some(event) = gamepad_handler.next_event() {
+                if let gilrs::EventType::ButtonPressed(button, _) = event.event {
+                    match button {
+                        Button::DPadDown => self.joypad_state.down = true,
+                        Button::DPadUp => self.joypad_state.up = true,
+                        Button::DPadLeft => self.joypad_state.left = true,
+                        Button::DPadRight => self.joypad_state.right = true,
+                        Button::Start => self.joypad_state.start = true,
+                        Button::Select => self.joypad_state.select = true,
+                        Button::East => self.joypad_state.a = true,
+                        Button::South => self.joypad_state.b = true,
+                        _ => {}
+                    }
+                }
+            }
+
+            for (_, pad) in gamepad_handler.gamepads() {
+                self.joypad_state.down |= pad.is_pressed(Button::DPadDown);
+                self.joypad_state.up |= pad.is_pressed(Button::DPadUp);
+                self.joypad_state.left |= pad.is_pressed(Button::DPadLeft);
+                self.joypad_state.right |= pad.is_pressed(Button::DPadRight);
+                self.joypad_state.start |= pad.is_pressed(Button::Start);
+                self.joypad_state.select |= pad.is_pressed(Button::Select);
+                self.joypad_state.a |= pad.is_pressed(Button::East);
+                self.joypad_state.b |= pad.is_pressed(Button::South);
+            }
+        }
+
+        if let Some(window) = &self.window {
+            let keys = window.get_keys();
+
+            self.joypad_state.down |= keys.contains(&Key::Down) || keys.contains(&Key::S);
+            self.joypad_state.up |= keys.contains(&Key::Up) || keys.contains(&Key::W);
+            self.joypad_state.left |= keys.contains(&Key::Left) || keys.contains(&Key::A);
+            self.joypad_state.right |= keys.contains(&Key::Right) || keys.contains(&Key::D);
+            self.joypad_state.start |= keys.contains(&Key::Equal);
+            self.joypad_state.select |= keys.contains(&Key::Minus);
+            self.joypad_state.a |= keys.contains(&Key::Apostrophe);
+            self.joypad_state.b |= keys.contains(&Key::Semicolon);
+        }
+
+        self.joypad_state
+    }
+
+    fn set_rumble(&mut self, rumbling: bool) {
+        if rumbling != self.current_rumble && let Some(ref mut gamepad_handler) = self.gamepad_handler {
+            self.current_rumble = rumbling;
+
+            let ids = gamepad_handler
+                .gamepads()
+                .filter_map(|(id, gp)| if gp.is_ff_supported() { Some(id) } else { None })
+                .collect::<Vec<_>>();
+            if ids.is_empty() {
+                return;
+            }
+
+            let magnitude = if rumbling { 0xFF } else { 0x0 };
+
+            EffectBuilder::new()
+                .add_effect(BaseEffect {
+                    kind: BaseEffectType::Strong { magnitude },
+                    scheduling: Replay {
+                        after: Ticks::from_ms(0),
+                        play_for: Ticks::from_ms(16),
+                        with_delay: Ticks::from_ms(0),
+                    },
+                    envelope: Default::default(),
+                })
+                .gamepads(&ids)
+                .finish(gamepad_handler)
+                .unwrap();
+        }
+    }
+}