generate tone with specified pitch, amplitude, and duration

I'd like to see a function similar to beep() that (A) works and (2) allows the caller to specify pitch, amplitude, and duration. With a sequence of calls to such a function, simple musical melodies could be generated.

Dr. Phillip M. Feldman

Take a basic sine wave of 440 Hz, play it in a loop, and use snd_tune to adjust it to the frequency you need.

I've looked at the documentation at the following URL:

http://www.xuduo.cn/Tutorial/Manual_en/asnd_tune.htm

It's not clear how this is working. I assume that snd_tune changes the frequency by simply modifying the playback rate. If so, this will also change the duration, which is undesirable. I suppose that I could make the sound longer than what's needed, and then use a combination of snd_tune() and snd_stop() to achieve the effect that I want, but this would be ugly. I'd like to see a cleaner mechanism for producing a sequence of tones.

Thanks!

not sure about the way snd_tune is working, but i used it to achieve the similar effect - in a piano simulator. i took 15 real note sounds of one octave and then changed their pitch with snd_tune, without noticing difference in duration.
i suppose you can make a simple loopable sound of 440 Hz and play it in the loop, use snd_tune to transpose it and snd_stop to stop it (or snd_tune to lower the volume till silence)

use snd_loop() and when the sound has played long enough, then use snd_stop().
This way you can tune the frequency as you wish without having to worry about playback length.

OK. Both of these sound like workable solutions. If anyone is willing to post a sample of code, that would be even better, but I think that I can take it from here.

Thanks!

Phillip