Copyright on streaming udio over the internet?

Answer 1

There is no copyright on streaming audio over the internet.

Or rather...

The technology used (software/hardware) for the actual streaming may be copyrighted, but some is most probably still free to use.

Audio is anything audible. If it can be heard, then it is Audio.

If you plan on streaming music, then you might be doing something illegal by streaming it over the internet. Most music has got copyrights attached, and so you need the consent of the copyrightholders to do so.