4th tests

[Giovanni Voltaggio]

Thanks!  Seems like this test is another good one:  play the lower  
note of the 4th and a minor 3rd below it, compare that to the major  
6th comprised of the upper note of the 4th and the test note.  The  
beat rates should be the same.  Example:  to test the A3-D4 interval  
play A3 with F#3, then F#3 with D4, the beats should be the same.

Guess I shouldn't be testing my 4ths anyway, not without giving them  
time to study.

Giovanni


On Sep 29, 2005, at 4:35 PM, Alan Barnard wrote:

> Play the lower note with the major third below it, compare to the 6th
> between the upper note of the 4th and the test note. The sixth MUST be
> faster or you are on the wrong side, i.e., you're 4th is narrow  
> instead of
> wide. Example: Test the A3-D4 4th with F3, the F3-D4 6th must beat  
> faster
> than the F3-A3 third.
>
> If the beat of the fourth is hard to sort out from false beat in the
> string, try playing the fourth more softly, while listening hard.  
> Or, in
> the tenor and bass, you can play the ghost tone by holding down the  
> fourth
> and striking, then releasing, the note two octaves above the lower  
> note of
> the fourth, e.g., ghost the D3-G3 fourth by holding it down and  
> wanging
> (and releasing) D5.
>
> The only other tests I know of are comparing it's beat rate with  
> other 4ths
> you've tuned (once you're sure the interval is properly on the wide  
> side of
> pure) and comparing your fourth to it's companion 5th in a good,  
> clean,
> pure to slightly wide octave. The fourth must beat faster than the  
> fifth,
> usually about 1 bps or slightly faster if you are brave and like purer
> fifths, e.g., in the D3-D4 octave, the D3-G3 4th is appreciably  
> faster than
> the G3-D4 5th.
>
> Alan Barnard
> Salem, Missouri
>
>
>
>> [Original Message]
>> From: Giovanni Voltaggio <a440ps@sbcglobal.net>
>> To: Pianotech <pianotech@ptg.org>
>> Date: 09/29/2005 2:58:04 PM
>> Subject: 4th tests
>>
>> Hi List -
>>
>> I was trying to remember the tests for P4ths but I can't recall
>> those.  On a piano with nice clean beats setting a P4th isn't much of
>> a problem, but test intervals can sometime make the process easier.
>>
>> Giovanni V.
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