there is a metronome function which sends MIDI Notes, by default C#1 on Beat and Measure to Channel #10 of the default port (a GM compatible sound module would output the typical metronome sound).
This can be configured at the Options page under 17/33
I think that this is sufficient.
By enabling the Audio DAC, MBSEQ would be unnecessarily (over)loaded by outputting the wavestream.
There is also not enough RAM available for such a feature (the remaining RAM should be saved for future features)