Same concern here: I was in Zurich yesterday evening and the sound was very poor. At the beginning the lead singer could almost not be heard and towards the end his voice was echoing in a loud and disaggreable way. The rest was a bit of a mish-mash; keyboards were often not clear. I've experienced worse, but also much better sound. First I thought it had to do with the hall (Volkshaus), but a friend told me that he recently went to a Steven Wilson concert in the same venue and the sound was perfect. So, if it is actually possible to have decent sound in the Volkshaus, why do perfectionists like Dream Theater not pay more attention to that. I listen to their music a lot on CD, but the concert experience was a bit disappointing.