Plug the RCA end of the cable into the cassette player. The red and white wires must be connected to their respective holes.
Plug the 3.5mm end of the cable into the line in socket on your computer. This will be located at the back and is usually colored light blue.
Switch on the cassette player and insert the tape you wish to record.
Right-click the sound logo on your computer and select "Recording Devices."
Select "Wave Out Mix" and click "OK" to save these settings.
Download and install some audio recording software. See the Resources section for a few examples.
Open the software and press the "Record" button, then press "Play" on the cassette player.
Press "Stop" on the recording software when the cassette tape has finished playing. Your cassette will now be recorded to your computer.
Click "File" and select "Export" to save a playable version of the recording.