How should I do this if I wanted to stream Spotify using my smartphone but the audio comes from the speakers connected to my PC? I only have USB speakers that can't be connected to my smartphone using the 3.5 mm jack.
Yes you can using wifi.
- download VLC player to your pc.
- download VLC direct from google play store.
Here is the video check it out : Stream Music from Android Device to Computer - wireless - VLCDirect - JoFromAndroid | YouTube
Connect your device android device and PC with Xender (app) and enjoy your phone as audio streaming server.