A 2nd potential explanation is that a application update has happened, after which the default settings for Ambient Sound have now adjusted. Within this next circumstance, you will need to change the settings once more to work with Ambient Sound. Physicist Werner Meyer-Eppler had been inspired by Homer Dudley's 1948 https://macrobookmarks.com/story18413770/helping-the-others-realize-the-advantages-of-galaxy-exploration-music