software filters


It seems that with the popularity of digitized stored music there should be software to equalize/filter the music. Does anyone know of any such products and have you used them?
musicnoise
These ary widely in quality. Some are no better than the old "graphic equalizer" boxes. Terrible.

The best of these IMO, is the EQ that comes with full Amarra player software. This only runs on Mac, but its is totally transparent. I could not have gotten best of show at RMAF from TAS in 2009 without it:

http://www.sonicistudio.com/amarra

There are three filters that you can set amplitude, Q and frequency on.

Steve N.
Empirical Audio
Post removed 

I use a DAW with Sound Forge 15 which is a full mastering program and can be used to gently tweak sound files or radically change them if you do not have any bass or treble. Once I have altered the sound file I then save it as DSD files which are vastly superior to PCM in my opinion. It's a couple of hundred pounds so you have to have a good need for it.