So I got iTunes match working great on all my devices. (macbook pro, pc, iPhone, and iPad) MY questions is on my original device, my macbook pro, which as all the original music. Is upgrading my music if its below 256kbps going to cause me any problems down the road. I know in the past iTunes music was only playable on apple devices. Is the music I am redownloading now iTunes plus music that I can play on any device. The reason I am asking is before I upgrade my entire 10000+ song collection I don't want to be screwed if I ever leave apple products god forbid.