"Redline Monitor makes mixes sound identical on speakers and headphones."
Has anyone of you tried this
From their page:
Its proprietary algorithm performs a sophisticated combination of filtering, frequency-dependent delaying, mid/side processing, and room simulation to create a convincing acoustic soundstage that allows you to properly localize sound sources.
I would never use it, it kind of defeats the purpose of mastering, you don't want to add anything to simulate what you might hear and to then make corrections, you want to actually hear it for real and then add corrections.
Most mastering engineers I know say the most important tools the mastering engineer has are their years of experience followed by the sound of the room he/she uses.
As for compression I don't think its really needed that much in most ambient music, maybe a bit of limiting to make sure their are no overs of the digtial signal. Compression is over used in most popular music, I think its best to stay away from it for the most part.