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- From: luebkejs@steam.engin.umich.edu (Jeff Luebke)Subject: Re: generating red
- box tonesDate: 2 Feb 1994 18:50:00 GMT
-
-
-
- OK. Quite a few people emailed me about the program for generating red box
- tones for the Mac, so I'm posting it. A little explanation first: The program
- that I wrote this program on <department of redundancy department...> is a
- package called Mathematica. It's a symbolic equation manipulator, and it is
- *very* cool for doing math and calculus. It's not public domain however, and
- it is quite expensive (the full fledged version sells for around $800.
- OUCH!). If you're in college, chances are fairly good that it may be
- supported by the engineering department on their network. Check around. OK,
- enough of the preamble, here's the program:
-
- p=0.033;
- f1=1700;
- f2=2200;
- s[t_]:=Which[0<=t<p, 1, p<=t<2p, 0,
- 2p<=t<3p, 1, 3p<=t<4p, 0,
- 4p<=t<5p, 1, 5p<=t<6p, 0,
- 6p<=t<7p, 1, 7p<=t<8p, 0,
- 8p<=t<9p, 1, t>=9p, 0];
- tone=(Sin[2Pi f1 t]+Sin[2Pi f2 t])s[t];
- Play[tone,{t,0,9p}];
-
- That's it. The variable p is the timing of the tones (in seconds).
- f1 and f2 are the two frequencies (in Hz).
- The nice thing about this is that this tone is exact, unlike many RS
- conversions which depend on what crystal you use. My suggestion: go get a
- sappy recordable valentine card from Hallmark and record these tones to carry
- around with you.
-
- Have fun!
-
- Jeff Luebke
- luebkejs@engin.umich.edu
-