Twelve Tunelab settings

[Jason Kanter]

I have put a slide show of the deviation curves of several different Tunelab settings here:
http://rollingball.com/images/TwelveTunelabSettings.mht
You may need to "accept" some ActiveX controls in order to view this 24-image slide show. It works best if you click on "slide show" in the lower right.

This takes two pianos: a Steinway D and a Kawai studio. Using Tunelab's new Auto feature, I set each of these pianos to twelve different ratio settings: for example, 6:3/4:1, 6:3/4:2, 8:1/8:1 and so on.

The slide show displays how the "deviation curve" region of Tunelab is affected by these settings. 
The deviation curve shows, for any given partial ratio, how many cents away from "perfect" it is across the piano.
Bass ratios are displayed from A0 up to about D4, and treble ratios are displayed from D4 up to C8.

When you set a curve using Auto, you can then switch to a different ratio display to see how that ratio gets affected by the current setting. Because all the partials are sounding at once, all the ratios are active at once. I took screenshots of how each of the twelve settings affects several other ratios. The resulting display is most interesting. For example, I conclude that 6:3/4:1 is NOT the best setting for either the D or the studio.

Enjoy, and ask questions...

Jason Kanter
rollingball.com

  ----- Original Message ----- 
  From: Jason Kanter 
  To: TuneLab_Users at yahoogroups.com 
  Sent: Tuesday, November 21, 2006 8:26 AM
  Subject: Re: [TuneLab_Users] Re: Version 3



  Group, this question of flatlining the deviation curve shows that there's a widespread misunderstanding of what we are looking at. 
  The only truly flat curve you can get is 8:1/8:1. But even with that, ALL THE OTHER RATIOS ARE ALSO SOUNDING. Tunelab is displaying only one, but the piano is in fact generating 6:3, 8:4, 6:1 etc in the bass, and 4:1, 4:2, 2:1, 3:1, etc in the treble. All of them. 
  Hopefully the file I am attaching will come through - otherwise go to the file section of the group on yahoo and take a look. It's the deviation curve on a Steinway D which is set by Auto to the ratio 6:3/4:1. But I have also captured what several other ratios are doing at the same time. Turns out that even the "best" 6:3/4:1 leaves the other ratios pretty noisy. 
  I'll post more along these lines later.

  Jason Kanter

    ----- Original Message ----- 
    From: m_montbriand 
    To: TuneLab_Users at yahoogroups.com 
    Sent: Tuesday, November 21, 2006 7:49 AM
    Subject: [TuneLab_Users] Re: Version 3


    So...
    Is the answer to this question the following???

    When using the auto-adjust function (version 3), the deviation curve 
    will not be a curve but actually a straight line from left to right 
    (and this is perfectly normal).

    I always understood it that you could use any notes to find your IH. 
    Do C1,C2,C4,C5,C6 work the best?
    If you can create a straight line in the deviation curve area 
    without doing any IH readings, than what is the purpose of doing the 
    readings in the first place?
    I never could get that deviation curve to look like the one in the 
    manual anyway. No matter what I did!

    --- In TuneLab_Users at yahoogroups.com, Doug Knabe <dknabe at ...> wrote:
    >
    > You could probably get a dead flat curve if you took no 
    inharmonicity 
    > measurements.
    > 
    > Did you double check that there were valid IH values from bass to 
    > treble? Press insert and check. C1, C2, C4, C5, C6 are recommended.
    > 
    > Doug
    > 
    > m_montbriand wrote:
    > > When adjusting the tuning curve, is it correct for the bottom 
    line to 
    > > come out straight? (---------) ???
    > >
    > > Thank you
    > >
    > >
    > >
    > >
    > > 
    > > Yahoo! Groups Links
    > >
    > >
    > >
    > >
    > >
    > >
    >




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