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Electrical interference recorded on audio recording devices

Electrical interference recorded on audio recording devices


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Old 05-16-23, 01:18 PM
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Question Electrical interference recorded on audio recording devices

I have a recording studio in my home. I have never had this interference with any audio equipment. I use an app on my Android phone to record in the studio. I play it back and the electrical interference is recorded with the audio. I unplug all electronics in the room, try it again, and there's no interference on the recording.

What are the potential solutions that don't involve getting behind the wall sockets? Is there something I can plug between the electronics and the sockets? Is there some device I can use? What are the causes of this and my options?
 
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Old 05-16-23, 01:52 PM
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Grounding issues often crop in home studios; ground loops. But since the recording device isn't "wired", that lowers the probability of ground loops.

Try to identify the source. Plug half of the electronics in and do a test recording. If no noise is recorded, unplug that stuff and plug the other half in. Repeat.

Keep increasing/decreasing by half and you might be able to locate the source. Switching power supplies (wall warts) are often electrically noisy.
 
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Old 05-16-23, 02:15 PM
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I went through the process of elimination and the issue did not repeat. Any thoughts?
 
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Old 05-16-23, 05:34 PM
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Question.... how are you getting external audio into an android phone ?
Surely you're not using the internal microphones.

I know it's easy with an I-phone.
 
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Old 05-16-23, 08:06 PM
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I unplug all electronics in the room, try it again, and there's no interference on the recording.
It likely not be the wiring in the house, but an electronic appliance that is causing the interference. Try plugging things in one by one until the issue comes back. It may also be something elsewhere in the house causing the issue.

Also, I know that chargers tend to cause a lot of noise on circuits. (power tool chargers, when charging a phone, etc)
 
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Old 05-16-23, 11:29 PM
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Yes, I am using the internal microphones. It works great with this app.

There is no noise when the two electronics in the room are unplugged.

Some suggested using conditioning line leads. Is that a potential solution?
 
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Old 05-17-23, 03:26 AM
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What lights were on when the the problem happened? LED bulbs use switching power supplies and some are very noisy.

Or it could have been internal and restarting your phone cured it.
 
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Old 05-17-23, 11:22 AM
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If you are using the microphone(s) in the phone then the noise would be in heard in the room whether or not you are recording.

It could be the placement of the phone.
Possibly picking up an AC hum or power supply noise from something near it.
Try moving the phone location.
Try putting the phone into airplane mode also.
 
 

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