Star rating: **** Also: Elephant 9,Voodoo Rooms Star rating: * Edinburgh Jazz Festival: Martin Taylor's mum thought her son was a pretty good guitarist until she heard Sylvain Luc, but if that's not recommendation enough, Luc is also Taylor's favourite player - and it's easy to hear why.

Star rating: ****

Also: Elephant 9,Voodoo Rooms
Star rating: *

Edinburgh Jazz Festival: Martin Taylor's mum thought her son was a pretty good guitarist until she heard Sylvain Luc, but if that's not recommendation enough, Luc is also Taylor's favourite player - and it's easy to hear why.

The duo didn't deliver Taylor's latest album, Double Standards, as the festival brochure appeared to promise. Instead, this was more a public airing of the sort of private sessions they might have in the garden at Taylor's French retreat: relaxed, spontaneous and conversational, with a level of creativity heightened not by a competitive edge but by the spur of playing for an audience in the moment.

The first half featured just three pieces, although it came as some surprise to discover that 20 minutes had passed between Taylor's introduction of "something by Charlie Parker" and the final chords of the same. What transpired in fact suggested several somethings by Charlie Parker, hinted at through daring false harmonics, darting runs and some fun with Taylor's capo, which led to something that might have been more familiar to Parker's African ancestors. All in all, fascinating and beguiling stuff with a bluesy quality that made it all the more personal.

None of these descriptions applied, alas, to the deeply disappointing appearance by Nordic wonders Supersilent's keyboarder Stale Storlokken in Elephant 9. The "fabulously exciting atmospheres" promised were replaced by, being kind, a sort of ELP refracted through an industrial club mix for the E generation. Having to stand while the trio footled (that would be the atmospheric bit) then riffed and thudded lumpenly only added to the torture.