Posted 27 January 2012 - 04:58 AM
I use one in my live setup, have been for a little while now.
have tried it for quite a few different purposes, nearly always with TouchOSC doing something or the other. I wouldn't go so far as to say that it's the end all solution for live control needs. As many people have stated already, the lack of physical feedback is the primary reason. But I think the positives outweighs the negatives.
Far and away the best feature is the complete customisable nature of touch screen controllers. You can have exactly the controls you want, exactly where you want them, exactly how big you want them to be. used to get so frustrated when trying to set up an traditnal midi controller only to find that I had too many superfluous controls getting in the way, or not quite enough pots, any number of things which ultimately meant that I would have to adjust how I wanted my set up to be, bassed on physical restraints of a piece of hardware. Of course you wouldn't have those issues with a custom built midi controller, but once again that controller would only be perfectly set up for one task.
Another great feature is the visual feedback element, things a screen at the end of it. You can get it to display all sorts of information. that coupled with the wireless connectivity means you can control your setup from all over the place. imagine the practical advantages for in house sound engineers, being able to stand right in the middle of the crowd and tweak the mix to perfection instead of running to and fro from the desk.
Other things like portability too. they take up very little space in a bag, have no sticky out bits to get snapped off, don't arise suspicion at customs (when you're arriving to play shows in a country which you don't have a working visa for) ;D I terms of footprint to function, unbeatable IMO.
I wouldn't go as far as to say theyre a one stop solution to all your control needs. They have things they're good at and things they aren't. XY controller, momentary switches etc they're great at. Fine adjustments, rotational encoders, not so. and of course, they won't suit everyone either.
in terms of use as a production tool, again depends what you're using it for. For certain control or display purposes yes, as sound sources I'm still to be convinced. But for spare time, noodling out fun little tracks they're brilliant.