Suppresion of Noise.... Please help

Dear All,

Im an amateur in audio processing, therefore I need your wisdom in
an apparently very simple task.

I have a voicemail recording which i can´t understand and im using
adobe soundbooth to try to fix it.

There is a musical instrument that doesnt enable me to listen to the
voice, and I’ve been researching a bit and seems that i have to set up
an equalizer filter to knock off any frecuencies out of the range of the
human voice (110 Hz to 2-5kHz)

Does any of you know how to do it?

Thank you very much for your help,

Best Regards,


Ps. Im using a MAC, therefore if you know any software that could do
better, I’m happy to change

This is not, by any stretch of the imagination, a simple task. In fact, there’s a good chance it’s flat-out impossible. Once an audio clip has been made, it’s impossible to unmix it unless it was specially recorded in a way that makes it possible to unmix it. That is not the case here.

You can try Equalizing (EQing), I would cut everything below 300Hz and above 2KHz to start with. But you didn’t say what instrument is in the background so I can’t say for sure what to try. Most instruments also occupy much the same frequencies as the human voice, so if there’s too much overlap you might never get any useful info out of it.

The best thing to do is to let some of us have a go at it. If it’s personal or there are legal issues, I understand that might not be an option. If the file is smaller than 250KB, you can put it in a .zip archive and upload it to this board. If you can’t do that, then I’d be willing to take a look at it if you send me a personal message over this board.