Am Sonntag, den 02.09.2007, 10:32 +0200 schrieb Daniël Mantione: > > Op Sun, 2 Sep 2007, schreef Jonas Maebe: > > > > > On 02 Sep 2007, at 07:58, Marc Santhoff wrote: > > > > > 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 > > > possibilities? > > > > Mac OS X doesn't. Linux doesn't either, afaik (we teach one lab sessions at > > the university where the goal is to write/complete a similar device driver > > for > > Linux). > > You can set the bell frequency using write(#27'10;freq') and the duration > using write(#27'10;duration'), where freq is in Hz and duration in > milliseconds. Then ctrl+g to ring the bell. It is possible to play music > this way.
Hey, I like control sequences for this task! I understand this as controlling the noise a write(#07) makes, pretty easy. I'll try it. Ahem, maybe you know how to control the volume, too? > Of course, the PC-Speaker is not really high fidelty sound. :) No problem here, I only need an acoustic feedback from a program reading values from a DMM, so the person using it doesn't has to look at the screen each time. But there have to be at least two or three different noises. Many thanks, Marc _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
