Let-off refers to:
the distance the hammer needs to travel towards the string before it disengages from the jack and stops travelling forward
Key dip refers to:
how far the key travels before it’s stopped by the front rail punchings
Aftertouch refers to:
how far the key travels down before letoff occurs
A hammer will double-strike if…
the jack did not fully slip out from under the hammer butt on depressing the key
A hammer will fail to strike on repeated blows if…
the jack did not fully slip back under the hammer butt on release of the key
Standard blow distance on a vertical piano ranges from:
38-50mm
Standard letoff distance on a vertical piano ranges from:
1-3mm
Blow distance affects which aspect of playing?
Maximum volume
Letoff distance affects which aspect of playing?
Minimum volume
Key dip affects which aspect of playing?
Speed
Lifting the dampers later in the key cycle can help do what?
lighten the touch
Dampers should lift when:
when the hammers are halfway to the strings
