Crossplatform Offline Audio Processing Library

I am looking for a开发者_运维知识库n audio dsp library for cleaning up some speech (voice) recording. I have not decided which language to use yet.

Here are the feature I am looking for:

• Work in Linux and Windows
• Importing MP3
• Working with multiple channels mixing
• Noise Filter
• Bandpass filter
• Compressor

I love to have these as well, but I can write my own if they are not available:

• De-esser
• multi-band compressor
• Expender
• Envelopes

(if you can suggest an application that do these in scripting / one mouse click, I will accept your answer too)

What about something like SoX?? http://sox.sourceforge.net/

Take a look at Juce from Raw Material Software.

It is free for non-commercial use, and very reasonably priced for commercial use. it also has a lot of built in audio capabilities (mixing, file I/O, etc.) and has a nice cross platform GUI toolkit as well.

Audacity does most of those things.