Music History quiz: What is the single most notable feature in a modern grand action? If we answer “double escapement”, then as piano historians we can high five. But as piano technicians we may be quietly confused. In our training, did we learn how to analyze, trouble-shoot, or regulate double escapement? Well we did, if by double escapement we...

One role key dip should not play in a grand regulation is Keyframe Transfer Gauge. Dip as Articulator and dip as Mediator work effectively on behalf of piano player enjoyment. With a firm cushion of frontrail punchings and a suitable aftertouch, dip provides consistency and comfort, control and finesse. But the same dip falls short as a Keyframe...