Great app needs more instruments PLEASE READ DEVELOPERS!

I am a huge percussionist and I feel like this game needs more percussion instruments. How about a xylophone or a marimba? Possibly a timpani or triangle? Bass drum? Why not a snare drum? It could use bells or chimes. Even the wood chimes would be awesome.

Ilikeouandthunder?????? about GarageBand, v2.2.1