The first image will give you a hint for what you should listen to for solving the first part. You may have heard a familiar sound also on wednesday morning, at 3 am? Go on from here to look for x:xx. If you find guessing this difficult, fear not: you can make your own music.
In the second image you'll find the first step for solving the second part. Try to identify the essence of the message. There's a connection between the parts. Some might say that the logic is bit fuzzy, so you might have to do some research.
Take one step sideways, and jump back: D. yyy.
The cache is located in N 60 11.(xxx-9) E 024.57.(yyy-25).