Most people can barely hear a one-cent difference in pitch, never mind a tenth of a cent. And you're going to try to tune to the nearest hundredth of a cent? What's the point? It's like trying to mow your lawn to the nearest 64th of an inch. There's too much nitpicking over the inconsequential in this business. Some of these "historical" or non-equal temperaments seem to achieve about the same result as letting the piano go out of tune for a few months, or even a year or two, then tuning just the unisons without setting the temperament. I've tried several of them and I still maintain that the difference is so subtle, it's barely worth bothering with. --David Nereson, RPT <div class="gmail_quote">On Fri, Apr 27, 2012 at 11:36 PM, Joseph Garrett <<a href="mailto:joegarrett@earthlink.net" target="_blank">joegarrett@earthlink.net</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Ron K. Said: These are good places to begin your journey, as well as your ear training to feel the difference of the thirds progression. ?These are the four strengths that are different enough to make a difference, yet not too far apart - they make a nice progression. ? KV 1.15KV 1.3KV 1.7KV 2.1 So the largest offset from ET ranges from 1.12 cents to 2.1 cents. ?It surprised me how little change in cents could be felt both "from the bench" as well as from the audience. ? KV 1.15A 0A# .99B -.57C 1.15C# -.15D .46D# .69E -.46F 1.15F# -.31G .76G# .31Major thirds 12.1-15.0 ? ET thirds = 13.7? KV1.3A 0A# 1.13B -.65C 1.3C# -.17D .52D# .78E -.52F 1.3F# -.35G .87G# .35Major thirds 11.9-15.2 KV 1.7A 0A# 1.48B -.85C 1.7C# -.22D .68D# 1.02E -.68F 1.7F# -.46G 1.14G# .46Major thirds 11.3-15.6 KV 2.1A 0A# 1.82B -1.05C 2.1C# -.28D .84D# 1.26E -.84F 2.1F# -.56G 1.4G# .56Major thirds 10.7-16.1 There are stronger choices, but these offer a 'safe' place to begin a temperament journey..." Ron, Hmmm? One slight problem, as I see it, most ETDs only go to ONE Decimal point, not two. I'll have to use my SOT, Modified with Bournes Ten Turn Pots, to lay those in. Seems like there is a need for that extra decimal point Someone should maybe tell the ETD manufacturers??? Thanks for the info. I'll give em' a try on my German Overdamper thang.<G> Regards, Joe Joe Garrett, R.P.T. Captain of the Tool Police Squares R I </blockquote></div>