[George from New England]

I use wine on ubuntu to still use IrfanView. Simple and works in my sleep.
wine also lets me use WinAmp.
That allows me to play with VST Host DSP v1.1
A tri-band audio processor
slim slow slider - C3 Multi Band Compressor 1.2.11
I am not aware of any linux tools that will do this audio processing.

[Dutch Boy]

Try Audacity. It might have the features you are looking for.