You have stayed for three songs and need to go. The musician begins another introduction just as you lift your bag. Suddenly leaving feels more complicated than arriving.
It does not have to be. Street audiences are temporary by nature, and performers know people have places to reach. When possible, use the space between songs to move away. If you need to leave during one, do so quietly without crossing directly in front of the player.
If you want to contribute, use the method the performer has made available. There is no universal amount that defines a grateful listener, and there is no need to announce what you gave. A brief thank-you at a suitable pause can mean more than a long explanation of your itinerary.
Look for an artist name or an official link if you would like to keep listening. Check that you have found the right musician before sharing a page with friends. A hurried photograph of a handwritten sign can become useful later, provided taking it does not intrude on somebody else's experience.
Then go. The song may follow you around the corner, becoming quieter under the ordinary sounds of the street. You do not have to keep it all. Leaving with one phrase, one name, or simply a better mood is already a reasonable outcome.
