Have you tried increasing the sample rate if size is not important and a little low pass filtering ?
----- Original Message -----
From: Anders Holmberg
To: Discussion list for Audacity users
Sent: Saturday, October 13, 2012 7:42 AM
Subject: [Audacity-users] Low bitrate.

I have a lot of files here with very low bitrate.
Most of them with 32kbps.
Can i do something to reduce the strange metallic nooise or what to call it?
Or is it impossible?

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