Dial Tone

[Richard Moody]

Having a phone near the piano and matching pitch I hear A4 and an F.  It might
be both F3 and F4.  I can't call it a pure 3rd because it has always sounded
"gargley".  I suppose those are the beats. If they are beats it is a little
slower than a F4-A4 3rd.

TuneLab reads A4  at 3.50 cents flat;  F4 at 0; and also F3 at 0.   However when
I put it in "auto" (recognize), it gives F2 "using 4th partial 349.228"  Even if
I set it at A4 in auto it jumps back to F2 again.  Setting it on F4 it jumps
back to F2.   Why it reads the 4th partial of F2 instead of the fundamental of
F4 is beyond me.      ---ric
ps If A4 is actually flat by 3.5 cents that might explain the slower beating.

----- Original Message -----
From: Michael Jorgensen <Michael.Jorgensen@cmich.edu>
To: <pianotech@ptg.org>
Sent: Thursday, February 22, 2001 3:32 AM
Subject: Re: resultant tones


> I once heard from a theory teacher that a dial tone in the United States is a
> difference tone and some people hear it as two distinct high treble pitches.
I
> hear one tone equal to F# 2.  Is there anybody on this list who hears it
> differently?
>
> -Mike Jorgensen
>