diff --git a/ch32v-insert-coin/src/app.rs b/ch32v-insert-coin/src/app.rs
index 4cb1053..c48a073 100644
--- a/ch32v-insert-coin/src/app.rs
+++ b/ch32v-insert-coin/src/app.rs
@@ -312,6 +312,7 @@ pub struct App {
     interfaces: Interfaces,
 }
 
+use settings::Level;
 impl App {
     pub fn new(
         config: Config,
@@ -396,29 +397,53 @@ impl App {
             println!("usb adc service");
         }
         if self.timers.led0_timer.need_service() {
+            let out = match self.settings.brightness {
+                Level::Off => 0,
+                Level::Low => 5,
+                Level::Medium => 25,
+                Level::High => 75,
+                Level::Maximum => {
+                    self.sequences.led0.next();
+                    self.sequences.led0.get_value() / 6
+                }
+            };
+
             self.timers.led0_timer.service();
-            self.sequences.led0.next();
-            self.services.led0.set_amplitude(
-                self.sequences.led0.get_value() / self.settings.brightness.as_brightness_divisor(),
-            );
+            self.services.led0.set_amplitude(out);
             // #[cfg(feature = "enable_print")]
             // println!("led0 sevice {}", self.sequences.led0.get_value());
         }
         if self.timers.led1_timer.need_service() {
+            let out = match self.settings.brightness {
+                Level::Off => 0,
+                Level::Low => 5,
+                Level::Medium => 25,
+                Level::High => 75,
+                Level::Maximum => {
+                    self.sequences.led1.next();
+                    self.sequences.led1.get_value() / 6
+                }
+            };
             self.timers.led1_timer.service();
-            self.sequences.led1.next();
-            self.services.led1.set_amplitude(
-                self.sequences.led1.get_value() / self.settings.brightness.as_brightness_divisor(),
-            );
+            self.services.led1.set_amplitude(out);
+
             // #[cfg(feature = "enable_print")]
             // println!("led1 service");
         }
         if self.timers.led2_timer.need_service() {
+            let out = match self.settings.brightness {
+                Level::Off => 0,
+                Level::Low => 5,
+                Level::Medium => 25,
+                Level::High => 75,
+                Level::Maximum => {
+                    self.sequences.led2.next();
+                    self.sequences.led2.get_value() / 6
+                }
+            };
             self.timers.led2_timer.service();
-            self.sequences.led2.next();
-            self.services.led2.set_amplitude(
-                self.sequences.led2.get_value() / self.settings.brightness.as_brightness_divisor(),
-            );
+            self.services.led2.set_amplitude(out);
+
             // #[cfg(feature = "enable_print")]
             // println!("led2 service");
         }
@@ -461,8 +486,7 @@ impl App {
 
         if self.services.synth0.need_service() {
             let out = match self.services.synth0.service() {
-                Some(value) => value / 10,
-                // Some(value) => value / self.settings.volume.as_volume_divisor(),
+                Some(value) => value / 6 / self.settings.volume.as_volume_divisor(),
                 None => 0,
             };
             self.interfaces
@@ -472,7 +496,7 @@ impl App {
 
         if self.services.sample_player.need_service() {
             self.services.sample_player.service();
-            let out = self.services.sample_player.get_amplitude() / 5;
+            let out = self.services.sample_player.get_amplitude() / 2;
             self.interfaces
                 .pwm_core
                 .write_amplitude(ch32_hal::timer::Channel::Ch4, out as u8);
@@ -541,7 +565,10 @@ impl App {
     pub fn coin_detect(&mut self) {
         #[cfg(feature = "enable_print")]
         println!("coin detect");
-        self.services.sample_player.play_sample();
+        // self.services.sample_player.play_sample();
+        self.services
+            .sequencer
+            .play_sequence(&crate::sequences::COIN_CHIRP, 0);
     }
 }
 
diff --git a/ch32v-insert-coin/src/main.rs b/ch32v-insert-coin/src/main.rs
index 633ad7b..1e9e74c 100644
--- a/ch32v-insert-coin/src/main.rs
+++ b/ch32v-insert-coin/src/main.rs
@@ -234,7 +234,7 @@ fn app_main(mut p: hal::Peripherals) -> ! {
 
     // coin debouncer (100ms)
     let mut sense_coin_input =
-        DebouncedGPIO::new(sense_coin_pin.degrade(), core_config.tick_rate_hz, 100);
+        DebouncedGPIO::new(sense_coin_pin.degrade(), core_config.tick_rate_hz, 20);
     // main button debouncer (100ms)
     let mut main_btn_input =
         DebouncedGPIO::new(main_btn_pin.degrade(), core_config.tick_rate_hz, 20);