#define AO_BEEP_MID_PANIC AO_BEEP_MID_DEFAULT
#ifndef AO_BEEP_MAKE_LOW
-#define AO_BEEP_MAKE_LOW(m) ((m) * 150 / 94) /* 2500Hz */
+#define AO_BEEP_MAKE_LOW(m) ((uint8_t) ((m) * 150 / 94)) /* 2500Hz */
#endif
#ifndef AO_BEEP_MAKE_HIGH
-#define AO_BEEP_MAKE_HIGH(m) ((m) * 75 / 94) /* 5000Hz */
+#define AO_BEEP_MAKE_HIGH(m) ((uint8_t) ((m) * 75 / 94)) /* 5000Hz */
#endif
#define AO_BEEP_LOW AO_BEEP_MAKE_LOW(AO_BEEP_MID)