[TriLUG] Sound Processing

[Jim Ray]

I'm sure there are some audio editing programs that have a nice little
digital high pass filter.  Seems like I've got a design for a filter around
somewhere if you want to do it with some operational amplifiers in the
analog domain.

Regards,
 
Jim
 
Jim Ray, President
Neuse River Networks
tel: 919-838-1672 cell: 919-606-1772
http://www.Neuse.Net
 
Connecting You to the World since 1997
 

> -----Original Message-----
> From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On
Behalf Of Brian
> McCullough
> Sent: Tuesday, July 10, 2007 9:48 AM
> To: Triangle Linux Users Group discussion list
> Subject: [TriLUG] Sound Processing
> 
> 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
> 
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