I just need one more thing to finish my application: five .aiff sound
files. Each of them needs to have three properties:
(1) Be one second in duration.
(2) Play a 3-pulse Morse code sequence (DAH-dit-DAH etc.).
And here's the tricky bit:
(3) Play at a frequency of 19,000 Hertz.
I've managed to create files with properties (1) and (2), but I'm
stuck at (3).
I've downloaded the Audacity application, but the best I can get from
it seems to be 12,000 Hertz. Other programmes I've tried (demo
versions mostly) won't let me set an absolute frequency.
Any suggestions?
dkj
P.S. Yes, I know most people won't be able to hear a sound at a
frequency of 19KHz; but that's a feature, not a bug!
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