From:	"Robin Y. Millette" <millette AT my-deja DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Sound C++ with DJGPP
Date:	Wed, 23 Jun 1999 10:45:58 GMT
Organization:	Waglo Institution
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References:	<3768A98B DOT 47FBAC85 AT computerpro DOT com> <376944DE DOT 2EEABF6B AT computerpro DOT com> <929775095 DOT 676729 AT diddley DOT primus DOT com DOT au> <37703244 DOT 48BB0E5C AT computerpro DOT com>
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In article <37703244 DOT 48BB0E5C AT computerpro DOT com>,
  paradise AT computerpro DOT com wrote:
> hmm...
>
> The problem I'm having with sound( ) and nosound( ) and delay( ) is that I
> don't know the syntax of what goes in ( ).
>
> In replace of sound( int _Frequency)
> ie. sound(A5)?????????? or something??????
> anyone know what I mean


I can give you a few hints, but this is off-topic so mail me for more...

middle A is 440 hertz (the _Frequency arg).
the octave above: 880 hz.
and below: 220 hz.

So for the next octave, you double the frequency. Since there are 12
semi-tones in our chromatic scale, you are looking for a number you can
multiply 12 times itself and get 2, or this: x ^ 12 = 2, or 2 ^ (1/12) =  x,
or x =	1.059463094359.

a,  a#,  b,  c 440 * 1.06 * 1.06 * 1.06 =  523,2511306008 (for the first c
after the middle a).

This make any sense?



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