Question [Q] Streaming Buffers - Per App Basis?

So, a while back a friend of mine, who did not have a rooted phone, asked if I did because there is a streaming audio app we both enjoy and he had found a way to increase and/or decrease the amount of buffering that takes place on a per app basis. I have long since lost the link to the app he provided and he cannot remember what it was, either. . . .which brings me to my actual question:

On my i337, is there a way (or is there an app that anybody knows of) to do what my friend purported to be possible?

If this is not posted correctly, please feel free if you are a mod to move to the proper place.

Please and thank you in advance.