Laptop sends computer static through USB audio interface - help!

  • Thread starter Thread starter gilbert
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gilbert

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Hi

I use a laptop on stage to play wavefile backing tracks. I also have an Edirol UA1A audio interface and an Edirol UM1-s midi inteface connected to the computer via a powered hub.

Everything was working fine (nice clear sound), until I spilt water on my laptop and had to get another one.

Now, even though everything is set up the same as with the old laptop, I find a very audible computer 'static' noise coming through the system. It is especially apparent when the computer is completing a new task (opening a new program).

I have tried moving the computer away from the mixer, with no difference. It disappears when I disconnect the audio interface, but of course I need it for the sound!

I also tried using the computers own sound output, but the noise is present there to.

I need to get rid of it - can anyone help?

Thanks!

Shaun Thomson
 
Does the new computer have DMA turned on for the hard drive? (I assume you're using Windows?) Sounds like maybe the hard drive is not keeping up with the audio data rate.
 
I assumed that the "static" sound was happening when you were playing music, but now I realize that you didn't say that. So, does this happen only when music is playing, or anytime you're listening to the sound output (either onboard or USB)?
 
Hi

Yeah - it happens all the time. It drops out momentarily when the computer is opening a new program, but then returns.

I called Edirol (USB interface manufacturers) and they said it would be the laptop. I tend to agree, because I didn't have this problem with my Toshiba laptop.

Help!!!

Thanks :-)
 
Hi Everyone

I just solved the problem by using one of my old laptop power supplies - the noise disappeared!!

Thanks for all your help.

Best regards

Shaun Thomson
 
noise

I had it happen to me when my laptop power addapter was plugged in and I was using a usb-122.

I lifted the ground and it went away so I imagine swapping the power supply would work if one were defective.
 
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