I figured that was the reason we've NEVER been able to get MIDI sound for the metronome. We have only a controller, no sound module hardware.
But the PC Speaker option isn't working either. It has worked on the soundMax card on our other machine (albeit faintly, we could hear it clicking), but with the temporary "new" machine (til the 1010 is back), the sound card of which is ""via ca'97 Enhanced audio [wave]" (according to Home Studio), no clicks.
Until I muted the CD volume control in the system mixer, I was getting a lot of noise, as well, so I'm wondering if it's a soundcard setting which I haven't been able to find. The CD volume control was the only one that seemed to make any difference in what I hear in the headphones. If I turned it up, the noise increased. If I muted it, the noise disappeared.
One other thing that's different since we were able to hear the PC Speaker clicks for the metronome: we've added a headphone amp, which we never used on the soundMax (where it did click), plugged into the line out of the sound card, instead of plugging the headphones into the PC speakers' headphone jack.