Live electronic music has about as much visual drama as a call centre: it's hard to look funky when you are touch-typing. So it is fair play that musicians mime busily even if the machines are really doing the work. For Plaid (Ed Handley and Andy Turner), this show, in theory, had no such problems since it boasted visuals from Bob Jaroc.

But adding sight to sound isn't a panacea for the performance problem - there are still plenty of pitfalls. Support act Yimino shared a key Plaid quality: aggressive beauty. There were lots of glitching, heavy beats and delicate one-finger synth tunes, lovingly reproduced. But the brainwashing visuals so resolutely avoided any relationship to the music that they deadened its effect.

Plaid and Jaroc had enough computing power on stage to put a man into space. This was shouting "live show", and they were on fine, PA-punishing form, if a bit graceless towards the end. Jaroc had an impressive variety of inspirations - a bulging Mexican cartoon superhero (Super Bario), vintage Japanese film and some abstract evocations of life's microscopic secrets. At times, the visuals were too polarised, mimicking the music exactly or ignoring it completely, when what's really interesting is the space between.

But for live performance to be special, the audience has to have some idea of what the performers are fiddling with. Otherwise why not just record it and put it on at the Odeon? That was the big let-down. The performers didn't look at each other once, or ever try to communicate how anything they were doing affected the show. Perhaps what was happening behind those impassive faces was an incredible feat of on-the-spot creation. Sadly, we'll never know.