How to stream music from a Mac to an iOS device?

I have an MP3 file that I'd like to stream from my Mac to an iOS. I think VLC can be used to achieve this, but I couldn't find the right settings on the VLC app and in iOS.

If I pick RTP multicast, for instance, how can I listen to this stream in iOS?

Eventually, I'd like to be able to do this from a live audio from the microphone, but I think the MP3 stage should come first.

Any thoughts?