diff --git a/src/audio.rs b/src/audio.rs
index 26c3a0a..1106471 100644
--- a/src/audio.rs
+++ b/src/audio.rs
@@ -12,6 +12,7 @@ pub enum AudioMessage {
     PlaySwitchClick,
     FanOn,
     FanOff,
+    SetVolume(f32),
 }
 
 impl AudioMessage {
@@ -215,6 +216,7 @@ impl AudioThread {
                     };
                 }
             },
+            AudioMessage::SetVolume(vol) => self.sl.set_global_volume(*vol / 100.0)
         }
     }
 
diff --git a/src/main.rs b/src/main.rs
index cd2cd28..e109175 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -9,7 +9,7 @@ use std::sync::mpsc::Sender;
 use audio::{AudioMessage, AudioThread};
 use cpu::{MemCycle, Status, I8080};
 use eframe::{
-    egui::{self, menu, Button},
+    egui::{self, menu, Button, Slider},
     NativeOptions,
 };
 use egui_modal::Modal;
@@ -32,7 +32,19 @@ fn main() -> Result<(), eframe::Error> {
 
 #[derive(Debug, Copy, Clone, Serialize, Deserialize)]
 struct Options {
+    #[serde(default = "Options::default_fan_enabled")]
     fan_enabled: bool,
+    #[serde(default = "Options::default_volume")]
+    volume: f32,
+}
+
+impl Options {
+    fn default_fan_enabled() -> bool {
+        true
+    }
+    fn default_volume() -> f32 {
+        100.0
+    }
 }
 
 struct AltairEmulator {
@@ -49,10 +61,11 @@ struct AltairEmulator {
 impl AltairEmulator {
     fn new(cc: &eframe::CreationContext<'_>, audio_tx: Sender<AudioMessage>) -> Self {
         let options = if cc.storage.unwrap().get_string("options").is_none() {
-            Options { fan_enabled: true }
+            Options { fan_enabled: true, volume: 1.0 }
         } else {
             eframe::get_value(cc.storage.unwrap(), "options").unwrap()
         };
+        audio_tx.send(AudioMessage::SetVolume(options.volume)).unwrap();
         let mut mem = [0; 65536];
         let cpu = I8080::new();
         rand::thread_rng().fill_bytes(&mut mem);
@@ -287,6 +300,7 @@ impl eframe::App for AltairEmulator {
             if option_window.draw(ctx, &mut self.options) {
                 self.option_window = None;
             }
+            self.audio_tx.send(AudioMessage::SetVolume(self.options.volume)).unwrap();
         }
         if (old_fan_enabled != self.options.fan_enabled) && self.fp_state.power() {
             if self.options.fan_enabled {
@@ -331,6 +345,7 @@ impl OptionWindow {
             match self.category {
                 OptionsCategory::General => {
                     ui.checkbox(&mut self.options.fan_enabled, "Fan enabled");
+                    ui.add(Slider::new(&mut self.options.volume, 0.0..=100.0).text("Volume"));
                 }
                 OptionsCategory::Cards => {
                     ui.heading("TODO");