|Bubble contact strip for synthesizer keys, 13-note
strip. This rubber strip contains carbon contacts inside each "bubble". When a key is
depressed, the key presses down on the bubble, and the carbon makes contact with the
circuit board (the keyboard "coil board"). This type of strip has two contacts per note; one
is to play the note itself, the other is to indicate the velocity at which the note was struck.
Most keyboards use 12-note strips for each octave, with one 13-note strip at one end.
This part may be NEW or USED.