I have to sing a song with an accompaniment track (piano recording that plays in the background while I sing). I want to listen to the voice recording of the same song to help me sing along with it, but with earbuds so no one else can hear the voice track. I want to play the accompaniment out loud and the voice track in my ears, but they MUST sync up exactly so each note is played/sung at the EXACT same time otherwise my singing will be out of tempo. How can I sync up the recordings that are on separate devices? I will play the accompaniment on a laptop and the voice track in my ears from my phone. HELP!