Hmmm, but would the speaker work with just a regular pc? If it did, it would drive my wife up the wall even more when I typed on it at night in the bedroom.
The speakers in Model M's didn't produce a keypress sound, Samir. The few Model M variants with actual speakers came with IBM UNIX terminal emulators, and made the "beep" sound UNIX systems made when they needed to get the operator's attention. (For example, in a token ring system, if you tried to send data to one of the other terminals on the network and it didn't respond.) One of the olde-timers here explained it to me once.