Yes, it is possible to get sound output from a serial port. Sure, it sounds terrible, but what did you expect. [markrages] ttyplay program first resamples the WAV file to the baud rate of the serial ...

Your friend is mistaken. This serial port he is talking about is called "CGA" and closely resembles a serial port. However it still requires a graphics card and a monitor! You can convert a CGA signal ...