microphone noise

[zygezund]

I wanted to record sound with quickTime player using internal microphone. After I turned the microphone on, it produced a horrible continuous loud high-frequency sound from speakers.

How to fix it?
[iMac 27' late 2009, osx 10.6.8]

tia

 

[killerrobot]

Hi Tia,

It's probably just producing feedback. Go to system preferences>sound, select the input tab and lower the input volume for the line in mic. Hopefully it's as simple as that. Let us know if that fixes it or not.

 

[zygezund]

Hi Tia,

It's probably just producing feedback. Go to system preferences>sound, select the input tab and lower the input volume for the line in mic. Hopefully it's as simple as that. Let us know if that fixes it or not.

thank you
yes, it helped... kind of...
the sound is too quiet now.
i would like to suppress the high-frequency only. just wondering - much less advanced, in multimedia especially, windows, has that control. the mac has not.

TIA [Thanks In Advance]
zygezund

 

[killerrobot]

Aww, some people sign with their real name at the bottom of the post

You can mess with more of the settings in Audio MIDI Setup app (Apps>Utilties Folder). Perhaps changing the frequency or enabling the hardware rate converter will get rid of the high frequency pitch. Hope that helps.

EDIT: I just had another thought was well, if the mic cable isn't shielded it might be picking up electronic/electrcal interference so make sure it isn't crossing over/touching any other cables.