“I have a Pi4 with a Hifiberry DAC 2 pro linked to my hifi separates. There was a faint but noticeable hum in the system. After swapping cables and trying a high output phone charger I believed the culprit to be the original pi power supply. So I decided to try this power supply to see if it made a difference. It did - no hum. I would recommend this power supply for audio projects.”