Tracker action

Organ keyboards (manuals) preferably provide continuous control over the amount of valve opening on an organ pipe, so that the further down a key is pressed, the louder is the sound. Thus a key may be pressed halfway down to produce a sound that is lesser in amplitude than when it is fully depressed, but, of course, greater in amplitude than when it is not pressed at all.

Electrical action

Mechanical linkages provide this feature directly, as do many pneumatic linkages. Electrical linkages, in some cases, lose this action, in a binary or coarsely quantized way, but improvements to electrical action have recently been made in many cases.

Organ keyboards and keyboard rail action

Manuals (hand-operated keyboards) usually have 61 keys comprising 5 octaves in 60 keys, plus one key to make it be a closed interval in log-on-log action. Such keyboards usually have provision for multiple rails. Unlike electronic piano keyboards that only have 2 rails (to merely sense velocity) organ keyboards, such as the Pratt Reed keyboard often have places to install up to 9 rails, to sense various key travel profiles.