![2012 Focus mk3 1.6EB radio problem. When I listen to music via aux, bt or usb (not radio) I always have a high-pitched noise. The noise comes from every speaker and is 2012 Focus mk3 1.6EB radio problem. When I listen to music via aux, bt or usb (not radio) I always have a high-pitched noise. The noise comes from every speaker and is](https://preview.redd.it/lqewsw5w1pr11.jpg?width=640&crop=smart&auto=webp&s=571146ef33e9f7ebf2763ec74e5f533f5368e494)
2012 Focus mk3 1.6EB radio problem. When I listen to music via aux, bt or usb (not radio) I always have a high-pitched noise. The noise comes from every speaker and is
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