For the strongest possible effect, use the original Ultrasonic… but in places where you don't need that much help with the ultra-highs, try Medium or Lite and apply a cleaner, subtler filter that lets more of the air through. These are not brickwalls: the idea here is that you can sprinkle these throughout your mix, anywhere you like, both before and after things that are nonlinear and distorty. Use these just like you would use Ultrasonic, if there are places in your digital mix where you think you'd benefit from suppressing ultrasonic frequencies. Ultrasonic Medium also subtly staggers the placement of its filters so it has a two-stage roll-off that is hopefully more natural sounding than just doubling up Ultrasonic Lite on its own. They also start a teeny bit higher, on the assumption that if you're reaching for a Lite version of the filter, you're looking to not hammer your highs too much. These are the same sort of thing, except Ultrasonic Lite has only one stage of filtering, and Ultrasonic Medium has two. So, enter Ultrasonic Lite (and Ultrasonic Medium). It's there to work in high sample rate mixes, between plugins that have nonlinearities and don't have their own filtering (some of mine do, like Console7) and it will clean up the top-end of a digital mix.īut, the original Ultrasonic has SO many stages of filtering that it starts to become audible, softening the highs, and if you used lots of them you'd eat your CPU and would be over-processing. Airwindows Ultrasonic is the stacked-up, five-biquad filter that rolls off everything above 20k, so in theory it has no sound of its own. Hi! This is just what it says on the tin.

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