diff --git a/ch32v-insert-coin/src/app.rs b/ch32v-insert-coin/src/app.rs
index fb7e0fc..00b764e 100644
--- a/ch32v-insert-coin/src/app.rs
+++ b/ch32v-insert-coin/src/app.rs
@@ -48,10 +48,10 @@ mod settings {
         pub fn as_brightness_divisor(&self) -> u8 {
             match self {
                 Self::Off => u8::MAX,
-                Self::Low => 4,
-                Self::Medium => 3,
-                Self::High => 2,
-                Self::Maximum => 1,
+                Self::Low => 8,
+                Self::Medium => 6,
+                Self::High => 4,
+                Self::Maximum => 2,
             }
         }
     }
@@ -459,7 +459,7 @@ impl App {
 
         if self.services.synth0.need_service() {
             let out = match self.services.synth0.service() {
-                Some(value) => value / 4,
+                Some(value) => value / 10,
                 // Some(value) => value / self.settings.volume.as_volume_divisor(),
                 None => 0,
             };
diff --git a/ch32v-insert-coin/src/main.rs b/ch32v-insert-coin/src/main.rs
index dac3140..c14a77a 100644
--- a/ch32v-insert-coin/src/main.rs
+++ b/ch32v-insert-coin/src/main.rs
@@ -237,7 +237,7 @@ fn app_main(mut p: hal::Peripherals) -> ! {
         DebouncedGPIO::new(sense_coin_pin.degrade(), core_config.tick_rate_hz, 100);
     // main button debouncer (100ms)
     let mut main_btn_input =
-        DebouncedGPIO::new(main_btn_pin.degrade(), core_config.tick_rate_hz, 100);
+        DebouncedGPIO::new(main_btn_pin.degrade(), core_config.tick_rate_hz, 20);
     // button debouncer (100ms)
     let mut volume_btn_input =
         DebouncedGPIO::new(volume_btn_pin.degrade(), core_config.tick_rate_hz, 100);
@@ -398,8 +398,8 @@ fn app_main(mut p: hal::Peripherals) -> ! {
             // println!("main button", value);
 
             match value {
-                true => app.main_button_release(),
-                false => app.main_button_press(),
+                true => app.main_button_press(),
+                false => app.main_button_release(),
             }
         }