ETD Question

[David M. Porritt]

Richard:

Having written Calculate for TuneLab, I can say that any VTD is at the
mercy of the Inharmonicity (IH) readings you give it.  VTDs function pretty
well while tuning with some background noise.  However, when taking IH
readings, ambient noise is the enemy.  Kids voices in the background, clock
chiming, whatever, will give the program the wrong things to analyze.  It's
trying to find out just what partials are there, and at what pitch.
TuneLab is trying to find 12 partials and measure them accurately.
Background noise really messes this up.  It's not possible for the computer
to tell if that sound at about the 3rd partial of F3 is really the 3rd
partial, or the phone ringing.

TuneLab has the potential for you to take IH readings manually.  I've done
this at times when needed.  I don't know if RCT can do this or not.
Remember, when you turn on the computer it knows nothing about the piano
you are about to tune.  It could be a Steinway "D", or a Grand spinet.  It
only knows how to tune by the numbers you give.  If the readings are
inaccurate, you get a bad tuning...it's that simple.  

I'm currently working on a new version of Calcul8.exe for TuneLab.  I hope
to have it finished in a few days.  I know you also have TuneLab so I'll
let you know when it is finished.

dave

*********** REPLY SEPARATOR  ***********

On 6/9/00 at 12:26 AM Richard Brekne wrote:

>Greg Newell wrote:
>> 
>> Richard,
>>     I can make a suggestion but it's based on my use of TuneLab not
Cybertuner.
>> In tuneLab when I run across this problem (very infrequently) I just
sample a
>> different note. I usually use all C's anyway. Can Cybertuner do this?
Naturally
>> the other thing you could try is mik position. Hope this helps ...
>> Greg Newell
>> 
>> Richard Brekne wrote:
>> 
>> > Kawaii grand GS-70 # 1647934... rather harsh sounding really,, Cyber
Ear
>> > gets like totally confused with this thing. For the first.. It wont
read A5
>> > at all. Just get this message saying "that note was not in the normal
range
>> > for a piano...etc". Secondly the curve it generates for this piano (no
>> > matter how many different samples of A's I give it) always ends up
with G1
>> > and G#1 being like waaaayyyyyy sharp, unbelievably sharp really.
Thirdly
>> > the curve in the treble tappers off quickly to being way to flat.
>> >
>> > I have tried several different tuning partials.. and just about every
thing
>> > I can think of but the same kinda thing happens every time. Anyone
have any
>> > ideas as to what can be the cause of this ??
>> >
>> > --
>> > Richard Brekne
>> > Associate PTG, N.P.T.F.
>> > Bergen, Norway
>
>-- 
>Richard Brekne
>Associate PTG, N.P.T.F.
>Bergen, Norway




David M. Porritt
dporritt@swbell.net
Meadows School of the Arts
Southern Methodist University
Dallas, TX 75275