Semi-weighted action keyboards (29)

The middle ground: more resistance than a pure synth action, less weight than a hammer mechanism, with a spring return. The default on serious MIDI controllers and stage synths.

Semi-weighted keys add a measure of inertia so velocity playing feels deliberate, while keeping the speed and lightness of a spring action. You will find them across the MIDI-controller market (61/88-key studio controllers) and on performance synths where players switch between piano parts and synth parts in one set.

Who it is for: producers who play piano parts occasionally but live in Ableton or a workstation; stage players who want one board for everything. For dedicated piano practice it is still a compromise - the fingers know the difference.

Actions in this class

Manufacturer action names that fall into this family:

semi-weighted (waterfall-style / piano-style)61 semi-weighted piano-size keys with velocity and aftertouch (premium synth-action keybed)velocity-sensitive semi-weighted keyboard with synth-action feel49 semi-weighted keys, Fatar keybed, polyphonic aftertouchSemi-weighted keys with AftertouchSemi-weighted custom NI keybed61-key semi-weighted keyboard with aftertouchSemi-weighted Waterfall keyboard, initial touchSemi-weighted keyboardSemi-weighted keyboard with velocity sensitivity

Semi-weighted action models (29)

Other action types:Hammer & weighted action (151)Synth action (49)Mini keys (12)

FAQ

Semi-weighted vs fully weighted - which to buy?

Decide by repertoire: mostly piano parts - fully weighted; mostly synths, pads and programming with occasional keys - semi-weighted.

Do semi-weighted keys have aftertouch?

Often - many controller lines add channel aftertouch at this class. Check the spec: it is one of the practical differences inside this family.