// Sets the system volume to the specified argument in range [0, 100].
func SetVolume(volume uint8) {
if volume > 100 {
volume = 100
}
utilities.WriteUIntValue("/sys/devices/platform/snd-legoev3", "volume", uint64(volume))
}
// Plays a tone at the given frequency for the given duration (in ms). To play a sequence of tones asynchronously, call PlayTone repeatedly in a goroutine.
func PlayTone(freq uint32, duration uint64) {
utilities.WriteUIntValue("/sys/devices/platform/snd-legoev3", "tone", uint64(freq))
time.Sleep(time.Duration(duration) * time.Millisecond)
utilities.WriteUIntValue("/sys/devices/platform/snd-legoev3", "tone", 0)
}