diff --git a/src/buzzer.rs b/src/buzzer.rs
index 2e46b0c..5e8e81e 100644
--- a/src/buzzer.rs
+++ b/src/buzzer.rs
@@ -38,19 +38,19 @@ impl GPIOBuzzer {
     }
     pub async fn beep_ack(&mut self) {
         // carrier  = 2300 Hz, sound = 440 Hz, duration = 1 sec
-        self.modulated_tone(2300, 500, 500).await;
-        self.modulated_tone(2300, 700, 500).await;
+        self.modulated_tone(2300, 659, 400).await;
+        self.modulated_tone(2300, 784,100).await;
     }
 
     pub async fn beep_nak(&mut self) {
         // carrier  = 2300 Hz, sound = 440 Hz, duration = 1 sec
-        self.modulated_tone(2300, 700, 500).await;
-        self.modulated_tone(2300, 500, 500).await;
+        self.modulated_tone(2300, 659, 400).await;
+        self.modulated_tone(2300, 523, 100).await;
     }
 
     pub async fn beep_unnkown(&mut self) {
-        self.modulated_tone(2300, 500, 500).await;
-        self.modulated_tone(2300, 500, 500).await;
-        self.modulated_tone(2300, 500, 500).await;
+        self.modulated_tone(2300, 784, 150).await;
+        self.modulated_tone(2300, 659, 150).await;
+        self.modulated_tone(2300, 500, 150).await;
     }
 }
diff --git a/src/main.rs b/src/main.rs
index 7714bb4..c1d5f84 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -20,6 +20,7 @@ mod pm3;
 mod webserver;
 
 const STORE_PATH: &str = "./data.json";
+const BUZZER_PIN: u8 = 26;
 
 fn setup_logger() {
     let log_level = env::var("LOG_LEVEL")
@@ -70,7 +71,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     };
 
     let store: Arc<Mutex<IDStore>> = Arc::new(Mutex::new(raw_store));
-    let gpio_buzzer: Arc<Mutex<GPIOBuzzer>> = Arc::new(Mutex::new(buzzer::GPIOBuzzer::new(4)?));
+    let gpio_buzzer: Arc<Mutex<GPIOBuzzer>> = Arc::new(Mutex::new(buzzer::GPIOBuzzer::new(BUZZER_PIN)?));
 
     let channel_store = store.clone();
     tokio::spawn(async move {