tested midi example

examples/host/cdc_msc_hid/src/main.c

@@ -169,7 +169,7 @@ void led_blinking_task(void)
 
   static bool led_state = false;
 
-  // Blink every 1000 ms
+  // Blink every interval ms
   if ( board_millis() - start_ms < interval_ms) return; // not enough time
   start_ms += interval_ms;