diff --git a/src/modules/external_interface.rs b/src/modules/external_interface.rs
index 48c39b2..9657c87 100644
--- a/src/modules/external_interface.rs
+++ b/src/modules/external_interface.rs
@@ -1,6 +1,7 @@
+use std::process::Command;
 use super::stream_states::{state_update::StateUpdate, enums::{SlideChange, SubScenes, Scenes}};
 
-const AHK_FILES_FOLDER: &str = "./src/ahk_files";
+const AHK_FILES_FOLDER: &str = "./src/ahk_files/";
 pub const OPTIONS_PATH: &str = "./options.json";
 
 pub fn create_keyboard_hooks(channel_tx: crossbeam_channel::Sender<String>) {
@@ -23,27 +24,120 @@ pub struct Hotkeys {
 }
 
 impl Hotkeys {
-    pub fn next_slide(&self, ) {
-        todo!()
+    pub fn get_hotkey_from_scene(&self, scene: SubScenes) -> String {
+        match scene {
+            SubScenes::CameraDefault => {self.hotkeys["hotkeys"]["obs"]["camera_scene_hotkey"].to_string()},
+            SubScenes::CameraWithUpperRight => {self.hotkeys["hotkeys"]["obs"]["Camera_Top_Right"].to_string()},
+            SubScenes::CameraWithLargeUpperRight => {self.hotkeys["hotkeys"]["obs"]["Camera_Large_Top_Right"].to_string()},
+            SubScenes::CameraWithLowerRight => {self.hotkeys["hotkeys"]["obs"]["Camera_Bottom_Right"].to_string()},
+            SubScenes::ScreenDefault => {self.hotkeys["hotkeys"]["obs"]["screen_scene_hotkey"].to_string()},
+            SubScenes::ScreenWithUpperRight => {self.hotkeys["hotkeys"]["obs"]["Screen_Top_Right"].to_string()},
+            SubScenes::ScreenWithLowerRight => {self.hotkeys["hotkeys"]["obs"]["Screen_Bottom_Right"].to_string()},
+        }
+    }
+    pub fn send_obs(&self, hotkey: String) {
+        if cfg!(target_os = "windows") {
+            Command::new(String::from(AHK_FILES_FOLDER) + "send_obs_back_to_propre.exe")
+                .args([self.hotkeys["windows"]["propresenter_re"].to_string(),
+                       self.hotkeys["windows"]["obs_re"].to_string(),
+                       hotkey])
+                .spawn()
+                .expect("next_slide process call failed");
+        } else {
+            println!("pretend linux is sending obs send: {}", hotkey)
+        };
+    }
+
+    pub fn next_slide(&self) {
+        if cfg!(target_os = "windows") {
+            Command::new(String::from(AHK_FILES_FOLDER) + "switch_and_send.exe")
+                .args([self.hotkeys["windows"]["propresenter_re"].to_string(), 
+                       self.hotkeys["general"]["clicker_forward"].to_string()])
+                .spawn()
+                .expect("next_slide process call failed");
+        } else {
+            println!("pretend linux is sending prosenter next: {}", self.hotkeys["general"]["clicker_forward"].to_string())
+        };
     }
     
-    pub fn prev_slide(&self, ) {
-        todo!()
+    pub fn prev_slide(&self) {
+        if cfg!(target_os = "windows") {
+            Command::new(String::from(AHK_FILES_FOLDER) + "switch_and_send.exe")
+                .args([self.hotkeys["windows"]["propresenter_re"].to_string(), 
+                       self.hotkeys["general"]["clicker_backward"].to_string()])
+                .spawn()
+                .expect("next_slide process call failed");
+        } else {
+            println!("pretend linux is sending prosenter next: {}", self.hotkeys["general"]["clicker_backward"].to_string())
+        };
+    }
+
+    pub fn change_scene(&self, _scene: Scenes, sub_scene: Option<SubScenes>) {
+        let hotkey: String;
+        if sub_scene.is_none() {
+            hotkey = self.hotkeys["hotkeys"]["obs"]["camera_scene_augmented"].to_string()
+        } else {
+            hotkey = self.get_hotkey_from_scene(sub_scene.unwrap())
+        };
+        self.send_obs(hotkey);
     }
     
-    pub fn toggle_stream_sound(&self, value: bool) {
-        todo!()
+    pub fn toggle_stream_sound(&self, turn_on: bool) {
+        let hotkey: String;
+        if turn_on {
+            hotkey = self.hotkeys["hotkeys"]["obs"]["unmute_stream"].to_string();
+        } else {
+            hotkey = self.hotkeys["hotkeys"]["obs"]["mute_stream"].to_string();
+        }
+        self.send_obs(hotkey);
     }
     
     pub fn toggle_computer_sound(&self, value: bool) {
-        todo!()
+        let direction: u8 = if value {1} else {0};
+        let time_delay = self.hotkeys["general"]["music_fade_time"].as_i64().unwrap();
+        if cfg!(target_os = "windows") {
+            Command::new(String::from(AHK_FILES_FOLDER) + "music_toggle.exe")
+                .arg(direction.to_string()) 
+                .arg(time_delay.to_string())
+                .spawn()
+                .expect("next_slide process call failed");
+        } else {
+            println!("pretend linux is sending prosenter next: {}", self.hotkeys["general"]["clicker_backward"].to_string())
+        };
     }
     
-    pub fn toggle_media_play_pause(&self, value: bool) {
-        todo!()
-    }
-    
-    pub fn change_scene(&self, scene: Scenes, sub_scene: Option<SubScenes>) {
-        todo!()
-    }
+    pub fn toggle_media_play_pause(&self, _value: bool) {
+        if cfg!(target_os = "windows") {
+            Command::new(String::from(AHK_FILES_FOLDER) + "music_toggle.exe")
+                .arg(self.hotkeys["windows"]["propresenter_re"].to_string()) 
+                .spawn()
+                .expect("next_slide process call failed");
+        } else {
+            println!("pretend linux is sending prosenter next: {}", self.hotkeys["general"]["clicker_backward"].to_string())
+        };
+    }    
 }
+
+
+#[test]
+fn hotkeys() {
+    use std::io::Read;
+    let settings_json: serde_json::Value;
+    {
+        let mut settings_file = std::fs::File::open(OPTIONS_PATH).unwrap();
+        let mut settings_str = String::new();
+        settings_file.read_to_string(&mut settings_str).unwrap();
+        settings_json = serde_json::from_str(settings_str.as_str()).unwrap();
+        drop(settings_file);
+    }
+    let hk = Hotkeys {
+        hotkeys: settings_json,
+    };
+    hk.change_scene(Scenes::Augmented, Some(SubScenes::CameraDefault));
+    hk.next_slide();
+    hk.prev_slide();
+    hk.send_obs(String::from("a hotkey"));
+    hk.toggle_computer_sound(true);
+    hk.toggle_stream_sound(true);
+    hk.toggle_media_play_pause(false);
+}
\ No newline at end of file