LED Lights and Music

To get a general idea of what's going on, I'm a CAD student and we are studying Electricity -- I was looking at a recent instructables guide that showed how to make a box that lights up to music. Well I was planning on doing something similar with a few twists.

1) Dependant on the frequency, there are certain LEDs that will light up
2) The ability to plug in a MP3 Player (Zune is my test subject)
3) The addition of two (2) small speakers around the size of maybe 2 inches

My questions pertain to what exactly will I need to do here and where I can find information on the parts required for this project. By all means please try and refrain from giving me specific parts (If it requires a Transistor with some requirements [If a transistors do have any differences] please just say Transistor with x requirements). I don't mean to sound rude but I really want to try and figure things out on my own, but I'm not sure where to really look.

I would grab bits and pieces off of these Instructables (Which are all very nice) but I want to actually know why to use a Transistor by reading up on it. If anyone can also mention to me a good place for speakers of smaller size I would appreciate that as well.

Assuming I'll have problems with connecting certain things like a plug for a Zune -- if you are willing to lend your help please just mention it as a response. Thank you all a head of time!

Protomega (author) 6 years ago
I just wanted to bump since it has been two days.