Why don't you pick a hard subject for discussion? The purpose of rescaling a piano is to find the optimum compromise between inharmonicity and tension with breaking % being used to determine if there are any overages. Hammer contact time is a measure of tone; short time being bright and long times being mellower, being of little use except as a point of interest.. There are guide lines available through use of some of the other jprograms that help guide you through tension and inharmonicity. Al Sanderson jpublished a group of papers on this subject you might like to get. Since little can be done about the bridges without replacing or renotching your only guide is tension and inharm. Changing these to fit with neightbors is the purpose. Bass strings, on the other hand, very often need rescaling sinply because most bass scales are often way of the charts of tension and inharm. Getting these two factors under control can vastly improve the quality of the bass. After all, you can do in a few minutes what it would have taken an old scale designer months of calculations to do. The guidelines provided by Roberts are good ones. Reading his papers again can be helpful in answering your questions. Hope this is helpful. Newton nhunt@jagat.com
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