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If you are tuning ALL of the notes to the center of the meter (what you call 440Hz), that will work fine. That's "equal temperament". Otherwise, you are tuning the necks out of tune with each other.

On a C neck, the E is the major third of the root key C. If you want the necks to be in tune with each other, the E on your C Diatonic should have the same meter reading as the G# on your E9th. On E9th, the G# is the major third of the root key E.

If you want to match up the necks with the meter, the C of the C Diatonic should match the E of the E9th.

Most people today tune their E9th E's and C6th C's sharp of the center line, then tune the E9th G#'s and C6th E's flat of the center line by the same amount. I use one "notch" on the meter as my guide (5 cents). ;-)

I tune my F diatonic using the same meantone scale that I use on my C6th: http://b0b.com/infoedu/WellTemperedC6th.html

If your meter isn't marked with cents, think of 5 cents on the meantone chart as 1 Hz mark on your tuner.

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Bobby Lee (a.k.a. b0b) - email: quasar@b0b.com - gigs - CDs, Open Hearts
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