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ProductDacMagic 100I can hear a humming or buzzing sound
DacMagic 100

I can hear a humming or buzzing sound

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Try this solution

Change cable placement

If power cables and audio cables are placed near eachother it can cause noise in the audio. Try to have as much distance between the DacMagic 100 and other power cables.

A single perpendicular crossing of power and audio cables is much better than having them in parallell.

If you must have them in parallell, leave as much space as possible between the audio and power cables.