Four piezoelectric disc sensors are used as triggers to send MIDI notes through Arduino to a synthesizer drum patch.<br /><br />Join this channel:<br /><a href="https://www.youtube.com/channel/UCQxQy-Z7SF7LFKsvSpqrTXg/join" target="_blank" rel="nofollow">https://www.youtube.com/channel/UCQxQy-Z7SF7LFKsvSpqrTXg/join</a><br /><br />Facebook: <a href="https://www.facebook.com/Sbranvlztronics/" target="_blank" rel="nofollow">https://www.facebook.com/Sbranvlztronics/</a><br /><br />Thanks for watching.<br />...<br /><a href="https://www.youtube.com/watch?v=5bEeztlA3VA" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=5bEeztlA3VA</a>