You need the Coleman Beat Locator, available at: http://www.colemantools.com/ With the Locator you can investigate all the checks you want. As for your question, if you wish to check the fourth while tuning down into the bass, use a normal 3rd-6th test. (Compare B2-D#3 to B2- G#3 in your example.) The reference note (B2) may not have been tuned, but that is OK as long as it forms expanded intervals with the two notes of the fourth. Kent On Mar 15, 2009, at 1:36 PM, Dan Reed wrote: > I am taking a fresh look at refining my temperment...(hey..sounds > like an ad for Xanax!) > > Here is the question...Does anyone use a 'reverse', M3 / M6 check > for checking the P4th width? > > 'Reverse', meaning, instead of, for example, C up to E(3rd) and C > up to A(6th) to check and set the width of 'A' in the E -A P4th. > > > > Will this work going down? Checking the P4th width.... C down to G# > (3rd) and C down to D#(6th) to check/set the D# width in the G# down > to D# P4... > > The point is, this 3rd/6th test is useful, when 2 notes in a M3rd > are known...as in any contiguous M3rd... > > > Why not use the test backwards, going down? > > My question is...can this beat rate comparison be useful going in > reverse? > > Going down, the M3rd is faster than the M6th...So, in setting the > M6th, it would beat 'slightly' slower than the M3rd... > > Dan Reed > Dallas, Tx > > > > > > > >
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