When is it enough?

[John Ross]

Hi,
I agree with the fact the piano can change in a short time in pitch, with heat.
Just try stage lights, after a piano comes out from lockup.
Regards,
John M. Ross
Windsor, Nova Scotia, Canada

J Patrick Draine wrote:

> >Andrew Remillard
> wrote
> >1) I really doubt turning on the heat caused to piano to go all that flat.  It
> >can take up to a week for a sound board to adjust to a change in environment,
> >not a matter of minuets  Although, yes, it can have some minor impact on your
> >tuning, I rather doubt that is what you ran into.
>
> RUBBISH! Yes, changes in humidity can take awhile to show up, but having
> the heat turned up -- especially when the vent is very near the piano --
> will have an immediate effect, which is obvious to a tuner using an ETD.
> The iron plate and the steel wires, change in temperature (and expand),
> going flat (up to a couple cents or more) within seconds of a temperature
> change.
>
> Patrick