There's another approach, what about controlling the LEDs with the pitch of the sound.
And this for power supply for LED Strip and Arduino: DC Barrel Jack
This would be better:-https://www.amazon.co.uk/2-1mm-Jack-Adaptor-Screw-Terminals/dp/B002LFNIWO
I would go with the Adafruit USB host shield.
Could you tell me why this would be better?
Did u make it?
Did you manage to get this functioning ?