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Expression for dial tones.
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	1) Create a new mono file, 10 in length or longer.
	2) Select a block of a quarter second at the beginning.
	3) Copy the desired number's expression into the clipboard.
	4) Bring up the evaluator.
	5) Paste the expression (Shift+Ins) in the Expression box.
	6) Choose OK.
	7) Move the start and finish markers right one second.
	8) Repeat steps 3 to 7 for each number.
1:
(sin(4417*t)+sin(7609*t))/2

2:
(sin(4417*t)+sin(8394*t))/2

3:
(sin(4417*t)+sin(9374*t))/2

4:
(sin(4856*t)+sin(7609*t))/2

5:
(sin(4856*t)+sin(8394*t))/2

6:
(sin(4856*t)+sin(9374*t))/2

7:
(sin(5397*t)+sin(7609*t))/2

8:
(sin(5397*t)+sin(8394*t))/2

9:
(sin(5397*t)+sin(9374*t))/2

*:
(sin(5937*t)+sin(7609*t))/2

0:
(sin(5937*t)+sin(8394*t))/2

#:
(sin(5937*t)+sin(9374*t))/2

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Expression for a sine wave.  Enter the desired 
frequency in the "f" edit box.
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sin(2*pi*f*t)

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Expression for square wave.  Enter the desired
frequency in the "f" edit box.
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sin(pi*int(2*f*t))

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Expression for saw-tooth wave.  Enter the desired
frequency in the "f" edit box.
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1-2*abs(1-2*f*t%2)