This is an instrument I designed for stage performances.
It had to be portable, so it sets up and breaks down and fits into a golf club bag.
I made it Pentatonic to make it musically versatile without having too many notes which would make it complicated.
This is tuned in the key of E because I play with a guitarist and you know how they LOVE the key of E.
This is one where you just need the general concepts and then make it to suit your own needs. Well, maybe all Instructables are like that.
If you are making a PVC instrument for the first time, I encourage you to use a pentatonic scale. It's easy to make lots of great music, fits in nicely with percussion, and, well, it's five notes and not 8 or 13.