Billed as a chance for creative cross-fertilisation between British and Brazilian musicians, Trocabrahma is effectively a series of mini festivals, featuring artists' own sets interspersed with collaborations. Half of Glasgow's Optimo duo, DJ Twitch, open with a lovely set of psychedelic samba and tropicalia oddities. Much later on, Os Mutantes play; their brilliantly eccentric late 1960s/early 1970s albums are the tropicalia mother lode. Unfortunately, it all goes horribly wrong in between .

The music industry is voracious in its search for new sounds. Most aren't new at all, but the current vogue for Brazilian party bands does feel like a transfusion of fresh blood. Bonde Do Role's With Lasers is a ludicrously fun record, mixing Latin exuberance with the hedonism of early New York hip-hop.

Frustratingly, they are not playing any of it at this show. They spend the best part of an hour gooning about over some staggeringly bad music generated by the DJ duo Radioclit. Before Bonde Do Role, and US rapper Amanda Blank, join them, Radioclit pump out some dreary tribal house. Blessed with a refreshingly un-English lack of reserve, BDR (two boys and a girl) are at least lively. However, the fruits of this entirely pointless collaboration are like the naffest of naff Europop. A song that seems to splice the opening riff of Summer Loving with a Salt-N-Pepa-ish break is the closest to a highlight. Actually, no: that was star-in-waiting Maria Vello's attempt to teach the audience something probably very rude in Portuguese.