Re: sony acoustic mirror and impulses ??? what is it??

From the Sound Forge help file:

You can use the Acoustic Mirror plug-in to add the acoustic coloration of real environments and sound-altering devices to existing recordings. Depending on the acoustic signature applied, the Acoustic Mirror plug-in can simulate responses varying from large concert halls to the sound of vintage microphones.

The help file in Sound Forge does a good job of telling you how to use and apply the various impulses (i.e. acoustic coloration mentioned above).