From:	tdixon DOT no AT spam DOT fwi DOT com (Timothy Dixon)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Sound C++ with DJGPP
Date:	Wed, 23 Jun 1999 13:05:02 GMT
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On Tue, 22 Jun 1999 20:03:00 -0500, 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
>
>
>
>
>C++
>
>
>
>
>
>Steven Taylor wrote:
>
>> > The library reference on sound says the syntax is:
>> > ------------------------------------------------
>> >     #include <pc.h>
>> >
>> >     void sound(int _frequency);
>> > ------------------------------------------------
>> > _frequency being a number for the tone, I guess.
>> >
>> > I keep getting errors when compiling.
>> > I don't think I'm putting these lines in my code properly.
>> >
>> > Help!!!
>> oh dear. If you're getting a linker error, then you haven't installed DJGPP
>> properly. If you're getting a compiler error, you either haven't read the
>> docs properly or you need to learn how to program in C or C++.
>


sound() starts the speaker oscillating at a specific frequency
specified by _frequency (an integer).  Frequencies between 250hz and
1500hz make useful sounds; way back when I had a sheet that listed
various notes and their frequencies (middle C, etc).

You would make a call like
	sound(1000);
to start a 1Khz tone and some time later,
	nosound();

to turn it off.  If you are doing anything complex at all between
sound() and nosound(), you might want to create a program that
consists only of a call to nosound() so that if your program crashes
you can shut the sound off before you go bonkers. :-)

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