***EDIT***
YOU CANNOT HEAR MANY OF THE FREQUENCIES AND HARMONICS ON BASIC COMPUTER SPEAKERS.

USE A HIGH-QUALITY SYSTEM OR HEADPHONES.

That being said, I increased the volume anyways because I'm pretty sure plenty of you don't read these descriptions to begin with. Hopefully the sound of your crappy speakers weeping in pain will make you realise that you need headphones.

I recommend headphones at about 10-30% of maximum volume.
***EDIT***

This was an experiment - I wanted to try writing something using only sine waves. I did my best to keep it simple and subtle.

Sit back, put those headphones on, bring the volume to a nice subtle level, and relax.

I think this came out pretty nice, and I hope you'll agree.

Enjoy.