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OK,I tried the cable test and check this out: with one pair of headphones (typical,mp3-player-style,in-ear headphones) the noise is present and touching the jack of the cable at the other end makes it stop;which tells us that there is a problem with the ground connection of the rim,right? But with ...

Yes,that's right,only headphones and adaptor connected.. The noise is constant no matter the volume/rim Algo/PCM level settings. Could you elaborate on that connecting-signal-ground-from-phone-plug idea? How can you tell that yours is connected correctly? (appart from not making a noise I mean ...

No,no,I'm talking headphones here..
Standard output level.
And I hear a constant humming sound -like the sound you get from an electric guitar that needs a set-up,you know- that goes away when I touch the rim.That's why I thought that it may be a grounding issue.Maybe something with the AC adaptor...

Hello everybody! Has anyone had any problems with ground loop noise or anything similar? On my wavedrum I hear a constant buzz/hum when not touching the rim and it goes away when i do; like what happens with electric guitars when you touch the strings. It's not loud but it gets REALLY annoying when ...