this movie already aired over 8 years ago... The mc is abandoned child after he grew up he found old guitar then he looked some master to taught him and then he decided to search his parent with music... The way he plays the guitar is unique... I don't even know either he is guitarist or bassist..
Is it, August Rush? Because I love that movie and it has the same synopsis. Edit: Someone beat me to the punch when i created this account to actually reply