I can't remember if the tape drive came with a TRS-80, but I do remember using the tape drive port to get sound from games like pacman. Basically it was hack to use the save to cassette to make sounds for the computer.

This game contains programming which produces sound effects that leave the computer through the AUX plug in the cassette cable. To hear the sound follow these instructions: First, load in the game. Remove the tape from the recorder if you loaded the game from cassette. Insert the large grey plug on the cassette cable into the AUX jack on the recorder. Insert an earphone into the jack labeled EAR on the recorder. Pop open the cassette door on the top of the recorder and reach in and hold in the interlock switch that is located in the left rear corner. Now press Record & Play together and then release the interlock switch. Sound should now come through the earphone.

I read this while I was power walking to the bus stop. I read it as:

When I was four I loved pegging.

I had SO MANY questions. None of which I wanted answered.

Pong is still arguably a balanced, and therefore good game. Especially if you were playing the Atari or Texas Instruments versions, since those may have been some of the last mainstream video games that didn't cheat in favor of anyone. Neither the player or the computer was favored, which became the norm for most video games rather quickly thereafter.