[TriLUG] Sound Processing

[Roy Vestal]

I use audacity (Linux, Windows, and Mac OSS) to clean up files before I 
send them to clients. You will need to convert the MP3's to wav (use lame)


Brian McCullough wrote:
> I have an issue that has been causing me a great deal of grief over the
> past while.
> 
> I have some sound files ( telephone recordings ) that have a VERY loud
> 60-Hz hum.  They are, at the moment MP3 files, but were WAVs coming out
> of the recorder.
> 
> I am wondering if anybody has and bright ideas for inserting a
> 180 degree out of phase signal to cancel the hum, or any other ideas to
> clean up these files.
> 
> ( The hum seems to be being inserted inside my machine, although I am
> willing to accept suggestions for correcting future meeting recordings,
> as well as correcting the old recordings. )
> 
> 
> Thanks,
> Brian
>