Feature guides

Classic vs Adaptive mode

What the MODE switch in HardStop Pro changes, why Adaptive keeps hits punchy while sustained notes stay clean, and when Classic is still the right call.

HardStop Updated 2026-10-06

What MODE does

MODE sits in HardStop Pro's MAIN CONTROLS panel on the Advanced view, with two settings. It starts on Classic.

The MODE control in HardStop Pro, set to ADAPTIVE rather than CLASSIC.
MODE on the main panel, set to Adaptive.
  • Classic clips with one shape the whole time, set by the Shape knob. Out of the box that is a hard clip, exactly what HardStop Basic does.
  • Adaptive listens for transients. When a hit lands, it clips with a hard corner to keep the punch. Between hits, on steady, sustained signals, it rests on a soft, rounded knee instead.

Adaptive never clips more than Classic at a comparable setting: Classic with Shape turned all the way to SOFT, the same soft knee Adaptive rests on. From there it can only firm up on the hits, never clip deeper.

Reactivity: what counts as a hit

In Adaptive, the Shape knob becomes REACTIVITY. It decides how readily Adaptive treats a sound as a hit, and how quickly it lets go:

  • Toward ACTIVE (right) it catches more hits and recovers faster between quick ones. Good for double kick or a busy drum bus.
  • Toward CALM (left) it waits for the big hits and holds them longer.
  • BALANCED (center) is the tuned default.

Click the REACTIVITY label to choose Recover: Fast, Medium (the default) or Slow, which sets how quickly it lets go at BALANCED. Your Shape setting is kept for when you switch back to Classic.

Why that helps

A hard corner is what keeps a transient punchy, but it is also what makes sustained sounds harsh. Why clipping distorts on some sources and not others explains why: a sustained note gives the corner's harmonics time to be heard.

Classic makes you pick one shape for both. Adaptive gives the hard corner to the hits and a soft knee to everything in between. Drums stay punchy, and sustained bass and cymbals distort less.

Which one to use

SourceTryWhy
Drums or drum busAdaptiveHits keep their punch, and cymbals and room sound fizz less between them.
Bass and sustained sourcesAdaptiveSustained notes are where a hard corner sounds worst.
Full mix or master busAdaptiveOne setting has to handle hits and sustains at once.
A deliberately hard, aggressive soundClassic, Shape hardThe same hard corner on everything, on purpose.
A consistently softer soundClassic, Shape softerOne gentle shape throughout, including on the hits.

These are starting points, not rules. Trust your ears.

How to compare them fairly

  1. Turn Auto Gain on, so you are comparing sound, not level. See how to judge a clipper without fooling yourself.
  2. Set your drive in Classic first, the way you normally would.
  3. Switch MODE to Adaptive without touching anything else, and listen to two things: the hits, which should keep their punch, and the sustained parts between them, which should get cleaner.
  4. Check with LISTEN. Turn on CLIP in Delta listen. In Adaptive you should hear less on the sustained notes than you did in Classic.

If you can't hear a difference, the material may not have much sustain for Adaptive to ease off on. Either mode is fine there.

Still stuck? Email support with your error number.