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Help me diagnose guitar hum/buzz

 
Guitar Repair and Maintenance
Last Post by condoravenue 11 years ago
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 condoravenue
(@condoravenue)
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Joined: 11 years ago
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Topic starter 24/01/2015 1:56 am   [#45763]

I have a new guitar (tele w/ noiseless pickups), and it is making a buzz or a hum noise. I run a cable directly from the guitar to Focusrite 2i2 audio interface, into a desktop computer (or laptop, see below), through TV speakers. I don't have spare guitars, amps, or cables, so I don't know if the problem is in the audio interface, the cable, or the new guitar. But here is what I can tell you.

  • I recognize the typical 60 cycle hum, and it sounds a lot like that.

  • The hum disappears 95% when I unplug the power source and run on battery. Then the further I remove the power cable from the computer the more the hum disappears.

  • It hums regardless of which pickup is being used, but the tone of the hum changes.

  • The hum is reduced, almost eliminated when I turn the guitar's tone knob to 0.

  • The hum is slightly reduced when I touch the strings or other metal parts.

  • The hum gets louder when i remove the cable from the guitar. Then it disappears if I remove the cable from the audio interface.

  • The hum disappears when I turn the guitar's volume knob off.



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