downweight
nounEtymology From down- + weight.
1
Entertainment, Lifestyle, Music The amount of pressure (in grams) required to press a key on a piano.
- Piano technicians have to measurements at their disposal for measuring touchweight: downweight and upweight. Downweight and upweight are measured in grams. To measure downweight, a gram weight is placed on the key at the front and a rap or thump is given to the shop bench, KEYBED, or action stack with one's fist to break the starting friction2004, Robert Palmieri, editor, The Piano: An Encyclopedia, second edition, Routledge, →ISBN, page 401: