Project records describe audio living in a persistent shell outside the page router. In practical terms, moving between the site's sections does not require rebuilding the player. The same track and playback position can continue while the visitor examines another part of the catalogue or a licence explanation. That continuity is the interaction problem this part of the concept addresses.
This is more precise than promising that the music never stops. Playback can still be affected by the visitor, the browser, a reload, a connection problem or leaving the site. The recorded design concerns navigation inside the experience. A clear case should describe that boundary rather than turn one architectural choice into an absolute guarantee about every possible listening situation.
For a comparable music website, we would define which transitions preserve playback and which actions intentionally change the track. Choosing a filter, opening an information section and selecting a new song are different events. If all three reset audio in the same way, the interface makes exploration harder. If none communicates its effect, a listener can also lose track of what is currently playing.