So a few people I face have around a 2 second sound clip when beginning a fight like a song or something. I was curious how to do that...
Is it like an item you buy in the market or is it more complicated?

It's called a kiai. You can buy it from the shop.

This should take care of all your questions about buy/setting up Kiai
http://forum.toribash.com/showthread.php?t=389218

ye its called a kiai sound they usually like 800 tc in market

It's called a Kiai. It's an mp3 file (I think) that is played at the beginning of each match and it has to be less than 5 seconds.

not mp3 it's a .wav file. you can ofc make an mp3 file a .wav via internet sources

its a sound item that you can buy