I hate hearing a click so got a Beat Indicator which gives you a metronome flashing LED like I used when I was younger. Works well, you can choose blue or red and I went with blue which I like better than the red that all the metronomes I've ever used have. Only issue is that it runs off MIDI power, and neither of my USB midi dongles supply power apparently, I found one off a Behringer device which does work, but is awkwardly cabled so I'll need to figure something for that. Otherwise Logic supports this in two ways. One, you can send out a tempo MIDI click (defaults C#1) and the BI can be sysx programmed to respond to that. Problem is that Logic is sending Note on and Note Off (velocity zero) which gives double beats in the BI which is hard to use. Other option is to program the BI to respond to MIDI clock, however in that case you don't get a clock on the lead in to the first track. But it gives a single flash as you want. I tried some Logic Environment tricks to filter out the note off, but didn't get it to work. Anyhow losing the first bar lead in isn't a big deal. Last issue is the form factor is a little awkward, just a box with straight out plugs. But shouldn't be too hard to integrate with your desk. Anyhow it's a great solution, and I think the only one out there for getting a visual click instead of audible.