The High Air knob focuses on the topmost frequencies, often referred to as the "brilliance" range. This adds that expensive, polished shimmer typical of high-end pop and electronic productions. It can make a dark cymbal sound crisp or give an acoustic guitar a boutique, string-forward tone. Under the Hood: Dynamic Equalization
Rebuttal: Linear phase EQs smear transients. Minimum phase EQs shift phase. Fresh Air uses a unique algorithm that reportedly avoids destructive phase cancellation in the critical 1kHz-5kHz range. In blind tests, most engineers prefer the phase coherence of Fresh Air over standard EQs. slate digital fresh air