Anyone else discovered venues with really odd acoustics? We're all used to the reverberant ones, the totally dead ones and that kind of thing, but we recently found a really strange one. A modern theatre, holding about 800 or so, and the support for us was a Stevie Wonder tribute. Him, a synth and a track. The rear was a vertical concrete surface, that the upper boxes of the line array were firing straight into, and the slap back was loud and did very strange things. His track sounded like it was playing backwards! That old fashioned sound you got when turning a record turntable backwards - sort of whap, whap, whap - totally strange, and very offputting. I think it might just have been a tempo thing where the time delay on the track was beating with the delay of the slap back echo. It didn't cause us any problems at all - just messed his track up so badly he had difficulty hearing it!