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I want to plug in my guitar and my phone into my amp so I can play over a song, the whole system works properly but can only hear my phone when I touch the aux head, otherwise it’s a loud buzz and ticking, maybe a loop. Not sure how to fix it.

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  • Does this answer your question? Guitar to PCIe line in Feb 20 at 0:03
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    The aux in is probably broken and only makes contact correctly when you’re touching it Feb 20 at 1:04
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    It's probably struggling with a mismatched pinout too. Phone has TRRS, amp wants TS. Without knowing amp & phone we'll never know.
    – Tetsujin
    Feb 20 at 10:48

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