I have Lemur on my iPad and I just tried the experiment of sending OSC commands to it from Max, one command to turn an LED on, the other to turn it off.
Turns out that the Lemur responds way too slowly for this to actually be useful (I saw delays up to at least 1 second before the LED changed color)
I’m wondering if anyone knows of another app (free or commercial, I need whatever works best) for the iPhone/iPad that can receive OSC commands (or even MIDI messages vi wifi) so as to be able to show the speed at which beats are changing. I need this so that a drummer can see what speed a particular loop is being played to make sure the band stays at the same speed when the loop is not audible.
I think there’s an inherent network latency in going over wifi, but I haven’t noticed anything as drastic as what you’re describing using TouchOSC. Though I’ve not tried going any timing sensitive feedback stuff.