[fpc-pascal] simple sound implementation
XHajT03 at mbox.vol.cz
Sun Sep 2 12:12:24 CEST 2007
On 2 Sep 07, at 7:58, Marc Santhoff wrote:
> I've read in the docs for the crt-unit that the procedure "sound()" does
> not work on windows.
> Since I'm searching for a portable way of playing simple tones
> (frequency & duration) I want to know if there is something as
> replacement for the crt unit or if it still needs to be done.
> FreeBSD has a simple speaker-device and is able to use it for simple
> freqency and duration sounds via ioctl as well as playing musical notes
> a simple acsii-notation. Maybe Linux, MacOS and others have similar
Most operating systems (i.e. the more advanced
ones than DOS, which was the original target of
the Crt unit) require you to pass both frequency
and duration at the same time rather than low
level control in the sense of "turn sound on with
frequency X", "wait", "turn sound off" assumed by
the Crt unit. I guess that we could alternatively
provide an overloaded Sound (Freq, Duration)
routine for most platforms, maybe that would be
useful situation similar to what you described in
your second e-mail...
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