diff --git a/src/buzzer.c b/src/buzzer.c
index 65a157b..f7243ef 100644
--- a/src/buzzer.c
+++ b/src/buzzer.c
@@ -8,7 +8,7 @@
 
 #include "buzzer.h"
 
-#define FREQ_BASE 24414063  // round(125 MHz [CPU frequency] * 100 [scaling] / 512 [PWM steps])
+#define FREQ_BASE 3906250  // round(125 MHz [CPU frequency] * 16 [scaling] / 512 [PWM steps])
 
 uint m_slice_num;
 
@@ -23,14 +23,14 @@ void buzzer_init(void)
 	pwm_set_clkdiv_int_frac(m_slice_num, 244, (14 << 4) / 100); // 125 MHz / 244.14 / 512 = 1 kHz
 	gpio_set_function(BUZZER_PIN, GPIO_FUNC_PWM);
 	pwm_set_wrap(m_slice_num, 512);
-	pwm_set_chan_level(m_slice_num, PWM_CHAN_B, 1 * 512 / 100);
+	pwm_set_chan_level(m_slice_num, PWM_CHAN_B, 1 * 512 / 100); // 1% duty cycle is sufficient for full voltage swing
 }
 
 void buzzer_on(uint16_t freq_hz)
 {
-	uint32_t divider_x100 = FREQ_BASE / freq_hz; // = 100 * 125e6 / 512 / freq_hz
+	uint32_t divider_x16 = FREQ_BASE / freq_hz; // = 16 * 125e6 / 512 / freq_hz
 
-	pwm_set_clkdiv_int_frac(m_slice_num, divider_x100 / 100, divider_x100 % 100);
+	pwm_set_clkdiv_int_frac(m_slice_num, divider_x16 / 16, divider_x16 % 16);
 	gpio_set_function(BUZZER_PIN, GPIO_FUNC_PWM);
 	pwm_set_enabled(m_slice_num, true);
 }