Gen 3 Prius (Audio/Electronics) :: Buzz When Audio In Aux Mode Using 12V Power
When my 2012 Prius II has audio in aux mode, for using the 3.5 mm aux audio jack, a super-loud and annoying buzz is created when I plug my laptop's power supply into the car via a 12V DC to 115V AC power converter plugged into either of the car's 12V aux power jacks.
I'm trying to listen to video lectures on DVD played on my laptop, feeding audio from my laptop to the car (2012 Prius II) using the 3.5 mm aux audio jack. I get clear sound when the laptop is running off battery. However, when I plug a 12V DC to 115V AC power converter into one of the 12V aux power jacks, there is a quiet and slightly annoying buzz.
When I then plug my laptop's power supply into the power converter (whether or not my laptop is connected to its power supply), the buzz's loudness and annoyance get magnified 10-fold, even if nothing is plugged into the aux audio jack. If the Prius audio mode gets switched to USB mode (with no input from the laptop), there is no buzz, so this seems particular to aux mode audio. (I cannot drive the car's audio from a video player on my laptop via USB mode, can I?)
I thought I remember reading a warning about this buzz and someone had a workaround, possibly involving some extra interface, but my searches on this forum aren't turning up anything. I plugged a surge protector into the power converter and got a mid-volume buzz, which went back to a full-volume buzz with the laptop power supply plugged in.
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