I'm an intermediate level player, with a limited amount of time spent outside the shed as of yet. I'm looking to change that up, and I've connected with a Frank Sinatra cover band. I'm familiar with the tunes of F.S., but I've never attempted to learn any of them. The band is telling me they will give me the key signatures for the tunes they want me to learn. My question is how to transpose it. Say the original is in Ab and the band wants to play it in G, etc. What's the method I should use for doing it? Sorry for my ignorance, any help is greatly appreciated.