Trichords tuning

[Doug Richards]

Don, 
Please enlighten me on what PAZ is.  I'm assuming it something is RCT but
what is it a measure of?

Thanks
doug richards
San Jose, CA
mailto:doug.richards@quantum.com

> -----Original Message-----
> From:	Roger Jolly [SMTP:baldyam@sk.sympatico.ca]
> Sent:	Monday, November 23, 1998 7:56 AM
> To:	pianotech@ptg.org
> Subject:	Re: Trichords tuning
> 
> Hi Don,
>             Thank's for the correction, it was late and I'm starting to
> become dyslexic.
> I used the first Soprano section F5 to F6, bass is left, rct in fine tune
> mode. The test was done to try to find all the variables to improve
> reproducibility in the PAZ figures that I have been getting.
> At this level there is slight changes in pitch dependent on action
> position, and also weather the string is excited with the hammer, or
> plucked.
> The more I explore, the more questions seem to pop up.The only conclusion
> that I am sure of thus far is that, hammer elasticity and strike point has
> a big effect on pitch. ( the stretch). I am beginning to wonder if our
> ears
> are playing tricks on us, for instance, if we don't hear the second
> partial, do we subconsciously revert and tune to the fundamental because
> that is where the sweet spot lies?????
> Trying to find ways to improve PAZ as a tool, makes me realize how little
> I
> know about the whole system. The more one discovers, the more one realizes
> how little we know. There is a lot of theories but few acid test.
> Anally obsessive.
> Roger
> 
> 
> 
> At 01:39 AM 23/11/98 -0600, you wrote:
> >Hi Roger,
> >
> >Which Octave? What tuning style (OTS? Which way is right? (bass or
> treble)
> >Did you tune the bass string then middle then treble? or M B T or T M B?
> >Did you use the listener ear or just watch the spinner? What partials was
> >RCT listening to?
> >
> >Interesting that your piano showed a *rise* in pitch. The ones I have
> >checked (small pso's) showed a drop in pitch with all three strings
> sounding.
> >
> >At 12:58 AM 11/23/98 -0600, you wrote:
> >> Greetings Issac,
> >>                        &  was with in 1.5c of pitch through out after 3
> >>tunings. The partial spectrum was within15% on each string of the
> unison,
> >>checked by PAZ.
> >>  Objective to tune 12 notes to obtain stable full bloom on every string
> (
> >>0.02c). Tune the first 6 note working left to right, the second 6 notes
> >>working right to left.
> >>  The first string was tuned purely to RCT, the second and third
> aurally,
> >>on average I ended up about 0.4c sharp per string, I corrected each
> string
> >>for full bloom, Playing the three strings together the indication showed
> a
> >>full cent sharp. but the unison sounded very tight.
> >
> >Regards,
> >Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.
> >"Tuner for the Centre of the Arts"
> >drose@dlcwest.com
> >http://www.dlcwest.com/~drose/
> >3004 Grant Rd.
> >REGINA, SK
> >S4S 5G7
> >306-352-3620 or 1-888-29t-uner
> > 
> Roger Jolly
> Baldwin Yamaha Piano Centre
> Saskatoon and Regina
> Saskatchewan, Canada.
> 306-665-0213
> Fax 652-0505