How to change the audio source in my Audi A3?

My Audi A3 only has one source selected, but I want to know how to change it to a different source for my music. Can someone guide me on how to do this?

To change the audio source, simply press the Media button on the center console or use the controls on the steering wheel to switch between radio, CD, or external sources such as Bluetooth or AUX. Make sure to have the desired source connected and selected in order to hear your music.

If you are using the Audi Music Interface, you can access your music playlist through the MMI system. Simply press the Media button, select the Audi Music Interface, and choose the playlist you want to play. Keep in mind that the music must be stored on an SD card for this method to work.