[pianotech] Tuning the duplex sections

[Ron Nossaman]

On 3/15/2011 3:42 AM, John Delacour wrote:

> So my question (and my surprise) remains. Why does good piano x bloom
> when I lift the dampers and good piano y wither?

I don't have much in the way of details, but I find the bloom much more 
dramatic in my redesigns than in most original configuration 
instruments. I think it's soundboard efficiency, and possibly long back 
scales from the elimination of tuned rear duplexes. It seems to me too 
that voicing is also contributory, with less bloom from brighter 
voicing. These are just impressions. There's not enough evidence at this 
point to say for sure, and the next piano may put me back to square one.

Ron N