Rockschool Acoustic Guitar Debut Grade Exam Book

Each song is played in a particular key or scale. So if you have to reproduce the exact notes you need the entire flute set. More over when you play in a band the singer will be comfortable in a particular key and therefore you need that particular key in flute. Else the notes will not match. It may be worthwhile to understand that you just need one instrument (Guitar, Piano, Keyboard etc.) to play all the keys unlike flute, which needs specific scale flute to play a particular scale.