[pianotech] Sustain

[Ron Nossaman]

> The swell effect when you lift the damper comes, in my view, from the
> growing sympathetic excitement of the strings that have been freed from
> damper constraint.  
> 
> David Love

Yes, and is there only when the system has it to give. A dead 
soundboard, whatever hammer voicing tricks are employed, won't 
have the bloom.

Ron N