https://benchmarkmedia.com/blogs/application_notes/152143111-audio-myth-switching-power-supplies-are-noisy?utm_source=Benchmark's+Application+Notes&utm_campaign=ebfa3d2c6f-Application_Note_2017_8-4-17&utm_medium=email&utm_term=0_7c8c792ee5-ebfa3d2c6f-198220265