Elenco Projects PC1-PC73 - Manual (Page 25)

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Build the circuit shown and connect the PC-interface cable to the
microphone input on your computer.
Project #PC13
Space War PC
OBJECTIVE: To look at the output signal from a circuit that
makes space war sounds.
If continuing from the previous experiment then close the Winscope
program and run it again, to reset the settings. Then use the mouse
to
set it up as shown here, and turn on the switch (snap part S1).
Click on the On-Line button to activate.
Press the press switch (snap part S2) several times to step through
the eight different sounds from the space war integrated circuit.
Hold it down for a few seconds each time so you can see the
waveform representing the sound you hear.
It is also interesting to switch to the 5ms/div time scale setting to
see more of the waveform at one time. Here are some example
waveforms using the same settings as above:
On-Line
button
Set up Time scale