Keyboard action is one of the biggest, and most confusing, spec differences between digital pianos and simpler keyboards.
The three common tiers
- Non-weighted/synth-action: keys spring back with uniform, light resistance - fine for organ or synth sounds, but doesn't build real piano technique.
- Weighted keys: extra resistance is added, but it's the same weight from the lowest to the highest key.
- Graded (hammer) action: resistance changes gradually across the keyboard, heavier in the bass and lighter in the treble - mimicking how an acoustic piano's longer bass hammers actually feel. This is the closest simulation of playing a real piano.
Why it matters
If the goal is developing genuine piano technique (dynamic control, finger strength, the ability to transition to an acoustic piano), graded hammer action is generally considered the more useful long-term choice. For casual playing, mixed keyboard/synth use, or where lighter weight and lower cost matter more, standard weighted or even non-weighted keys can still be a reasonable fit.
