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I'm no big techie myself, but having studied physics in regards to
sound, plus the fact that I tune pianos as a hobby has me thinking
about this.<br>
So the first thing you should try to think about is what kind of
tone is DECtalk generating. Is it a sine, a square, sawtooth, etc.
In this case it's a sine, which has zero harmonics, or overtones
that give it that unique texture.<br>
Melodies are based on notes, but notes are defined by a pitch in
frequency that are equally distributed over something call cents.
Cents, as you might already know, stands for a hundred. So there are
a hundred cents between each chromatic note. Let's start with A-440.
This is the standard tuning for concert pitch. A semitone below it
would be the twelfth root of two divided in half, which will give
you 415.2 I think. If you multiply that by two, you get 466.2.<br>
According to the piano school for the blind, they told us that there
is a ratio of one to two. From A0 to A#0 is only one difference, but
between A4 and A#4 there is a twenty-six HZ difference. So the
higher you go, the more bits you'll have in between. I suggest you
look up the theory behind equal temperament.<br>
While this HZ may be useful to know when creating music with tones,
it isn't enough to help me understand sample rates, bit depth, and
all those other stuff that particularly refer to digital
computation.<br>
<div class="moz-cite-prefix">On 12/27/2014 5:20 PM, Blake Roberts
via Dectalk wrote:<br>
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cite="mid:80B211FBDF7A48DEAC6A1B128CC12657@Blakethegreat"
type="cite">
<pre wrap="">I have known for years about the Dectalk command for generating musical
tones.
[:tone]
However, I have never understood which tones represent what notes. Does
anyone know of a method for figuring that out? As an example of a file with
tones, I am attaching We All Live In A Yellow Submarine text file. I have no
idea who made it. The fact that the tone command is used near the end to
create a melody amazes me.
Blake
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</pre>
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