Answer: The Tandy TRS-80 Model I
Early computers did not have discrete sound cards / modules and often did not even have a simple PC speaker on board. This did not prevent early PC enthusiasts from enjoying sound with an early PC model, but indirectly and unintentionally.
The Tandy TRS-80 Model I, manufactured by Tandy Corporation and sold by RadioShack from 1
The Model I was so poorly screened and produced such high-frequency interference that putting up a radio near the unit was quite a risk of sound effects. The noise effects were clearly not consistent with most applications, but they were surprisingly good for early space-based games.
Although the model was very popular and ultimately sold over 200,000 units, it was removed from the market in 1981 due to outdated hardware and tightened FCC regulations for radio frequency interference, which would require significant design changes.