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From: drsmooth@relex.com (Edhel Iaur)
Newsgroups: comp.sys.apple2
Subject: Re: Toner Program ...
Date: Sat, 19 Oct 1996 03:04:18 GMT
Organization: US-A2WUG
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dmitton@mulberry.com (Douglas E. Mitton) wrote:

>I have never heard of this c.1989 program before!  I know this is
>looking a gift horse in the mouth BUT is the source available
>anywhere?  I work in the telecom industry and am just plain curious
>about the workings of this one.

Ya just gotta play 2 tones at once (see below).  The IIgs has 32
(sometimes 15, if the programmer goes through the toolbox?) voices, so
playing 2 tones at once is pretty easy.

From the 2600 FAQ:


25. What are the DTMF frequencies?

DTMF stands for Dual Tone Multi Frequency.  These are the tones you
get
when you press a key on your telephone touch pad.  The tone of the
button is the sum of the column and row tones.  The ABCD keys do not
exist on standard telephones.

         1209 1336 1477 1633
 
     697   1    2    3    A

     770   4    5    6    B

     852   7    8    9    C

     941   *    0    #    D

--
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| \ \  /    #M#M#M||___________________---   +-    Edhel Iaur    -+
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