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Strange Issue With Aux Input & Zune

BlakSilvr

By BlakSilvr
in Audio, Electronics & Software

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BlakSilvr Enthusiast

BlakSilvr

Posted
Posted

Hey guys, I recently got my mp3 player setup all finished in my new truck. Here's a couple of pics of what I have:

 

IMG_3568.jpg

 

 

IMG_3570.jpg

 

Zune MP3 player, which is connected to the Zune dock that is then plugged into power and the AUX input jack on the front of the head unit.

 

The issue I have is this: Only when the engine is on, and when I have the Zune dock or the Zune itself plugged in to power, there is a high pitched whine/hiss from the stereo. If I mute the stereo it goes away. If I shut off the engine it goes away. And if I unplug the dock/player from power, it goes away. What is also odd is that this whine's pitch goes higher as I accelerate so there is this weird audio feedback of what I'm doing with the gas peddle. Now, this isnt really a huge problem because the music usually drowns out the sound, but I can hear it in quieter songs and in between songs. Could this be a problem with the cable I'm using, or the stereo itself? I'm using a typical 3.5mm headphone jack male-male cable, but maybe there is something else better insulated to block out this noise? I'm not sure, which is why I ask. Thanks ahead of time for anyone who can give me a hand with this.

topdj Enthusiast

topdj

Posted
Posted

Zune is picking up a ground from the jack and a ground from the power unit,

I have solve these, sometimes by lifting the ground connect on the shield to the audio jack

BlakSilvr Enthusiast

BlakSilvr

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  • Author
Posted
Zune is picking up a ground from the jack and a ground from the power unit,

I have solve these, sometimes by lifting the ground connect on the shield to the audio jack

 

 

Ok, so how exactly do I solve that problem?

topdj Enthusiast

topdj

Posted
Posted

elimitates the loop.

experience from installing amps for 27 years :banghead:

DJ , musician, ... you run into this over the years

 

you could alos use a Ground Loop Isolator between the radio and the Zune

omegafiler Senior Enthusiast

omegafiler

Posted
Posted

You can also just buy a Ground Loop Isolator online or at many electronics stores, such as Radio Shack. Just google it, you should find quite a few options.

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