I don't know about wav files or something similar, but you can always do it with a little old school programming.
Get QBasic from
http://download.microsoft.com/downlo...-US/olddos.exe
Then look under the built-in help for sound, here's a sample:
Quote:
From QBasic 1.1
SOUND frequency, duration
þ frequency The frequency of the sound in hertz; a value in the range 37 through 32,767.
þ duration The number of system clock ticks the sound lasts; a value in the range 0 through 65,535.
There are 18.2 clock ticks per second.
Example:
FOR i% = 440 TO 1000 STEP 5
SOUND i%, i% / 1000
NEXT i%
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BTW, we used to have fun doing this on all the computers at school :-)