If you want to play along with the MP3 on this one you’ll need to retune your uke to D tuning (A-D-F#-B), which is a whole step up from C tuning. If you’re playing by yourself there’s no need to retune -- C tuning is fine. I wanted to be able to play the harmonica on this and I didn’t have one for the key of F so I tuned a little higher so I could use the G harmonica. In case you’re also trying to play the harmonica part I’m using a Lee Oskar Melody Maker in G, which is also a little different than a standard harmonica.