QoS lowest priority

[neonF14]

Hi, I pretty new to PFsense and I am used how to set up QoS for a music streamer that I use.

Basically I want everything to be higher priority than the music stream and I want to limit that amount of bandwidth the streamer uses. (can it be port defined?)  Mainly so If I am at home watching a video and my wife wants to stream music it wont affect me.