The best noise reduction effect I know of is the noise reduction function in
Samplitude.

Oded.

> -----Original Message-----
> From:	Kurt S Nelson [SMTP:kurtnelson2@juno.com]
> Sent:	Thursday, August 19, 1999 10:33 PM
> To:	csound@maths.ex.ac.uk
> Subject:	cleaning recordings
> 
> Dear Csounders:
> 
> I am attempting to clean some noisey soundfiles using the dam opcode. 
> The signal (a piano piece off a CD) is not much above the noise floor of
> the original recording.  Hhaving not worked with compression or expansion
> much in the past, I am having a hard time selecting values for the
> threshold and compression ratios that result in a sound much better than
> the original.  Can anyone suggest any other opcodes or techniques for
> audio cleaning (maybe the term "de-essing" applies here)?
> 
> This is a project I am doing to practice for cleaning some old speeches
> on reel-to-reel tapes, and to educate myself in general.  Any suggestions
> would be greatly appreciated.
> 
> Sincerely,  Kurt Nelson
> 
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