Edirol UA25 noise

hello

i've been creeping this forum for a while and now have an excuse to post something.

i've recently got an edirol UA-25 soundcard from a friend so i can record some vocals and stuff. as soon as i plugged it into my macbook it started emitting a high pitched tone. pretty faint, but still, there.

i set it up as my main soundcard and it works beautifully, for itunes, etc etc. when i set it up to work with ableton, again it sounds great and works great when im using midi or pre-recorded audio etc. but when i record vocals they have this noise with them, its built right into the mic signal and gets worse when i compress it and stuff.

i've been reading people having humming problems with this soundcard but mostly relates to the output sound in general, mine appears to be completely fine in both monitors and headphones, its just the signal from the mic.
i know its not the microphone because the signal is fine when its plugged straight into the build in soundcard.

can anyone help me?

so far i've tried: 
-moving the soundcard around
-changing power outlets
-moving everything into another room
-different usb cables
-messing with latency/recording margin

here's my set up:
macbook 2.4Ghz 4GB RAM
ableton live 7
edirol ua25
SM58 microphone


any help would be greatly appreciated!

2 followers

ssffttccmmhh 4 years ago | 0 comments

4 answers

  • Eppe
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    99 answers
    128 votes received
    1 vote

    Hi Ssffttccmmhh ;P

    I don't know for sure what's causing your problem, but maybe it has to do with equipment being earthed/unearthed. I had lots of (high pitched) noise in my speakers, what solved it was putting my laptop power cable in an unearthed power socket and the rest of my equipment (audio interface, speakers etc) in earthed power sockets. This may not always work though, I don't know the specifics, I'm not much of a technician :)

    A quick way to find out whether your problem has something to do with stuff being earthed/unearthed is putting gaffer tape or something on the parts of your electric plugs that earth it (I dont know which country you're in, I'm guessing they look different in different countries), not on the pins that actually go into the sockets of course but on the rest of the metal parts and see if the noise is still there. I don't recommend using this as a permanent solution though because it's not safe, I read if something shortcircuits and you have your power plugs taped it may even electrify your laptop which probably won't feel very pleasant ;)

    I'd be happy to hear anyone else's advice on this too cause I sometimes still have this problem when working at places other than my house and don't know exactly what causes it/what to do about it.

    4 years ago | 0 comments
  • ssffttccmmhh
    contribution
    1 answer
    1 vote received
    1 vote

    Hey, I'm from the UK so all my power sockets are earthed.

    I even moved just my laptop, mic and soundcard away from all other electricals, into another room and still have the same problem..

     

    4 years ago | 0 comments
  • Eppe
    contribution
    99 answers
    128 votes received
    1 vote

    Ah bummer. You could still put tape on all the power plugs that have something to do with your music setup (computer, soundcard, speakers etc) just to see if it helps, if it does at least you'll know it has something to do with that and then you should probably go to an electronics shop or something and ask what to do about it. 

    Something else which I hadn't thought about is you could try recording at different sample rates (44.1khz, 48khz etc) and/or make sure Ableton is set to record at the same sample rate that your soundcard is running at, though I don't think high pitched noise is likely to come from recording at the wrong sample rate.

    4 years ago | 0 comments
  • Eppe
    contribution
    99 answers
    128 votes received
    1 vote

    Oh I just thought of something else, did you try unplugging the power cable of your macbook (e.g. have it running on the battery) and then record? When you do that is the noise still there? When I unplugged the power cable of my laptop the noise in my speakers disappeared. Again, not a permanent solution cause you probably want to be able to record and have your macbook plugged in at the same time, but at least youll be able to do some proper recordings and be closer to the root of the problem.

    4 years ago | 0 comments

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