I haven't seen the ad, but the Kronenbourg Website tells the story of L'Ouverture de 1664:
L'Ouverture de 1664 was composed by Jonathan Goldstein in November 2004 and reflects the musical styles co-existing on either side of the channel during the 17th century with composers such as Lully and Rameau on one side and Purcell and Handel closer to home.
Naturally as the ad is designed for the UK market the English influences were favoured. Or maybe it was because our fictional composer, Guy de Lafond, through pausing to drink his beer during composing the piece, discovered his natural affinity with British musical styles and stopped immediately for fear of being sent to the gallows…?
The size of orchestra is larger than would have been found in the 17th century but the choice of instruments is largely appropriate for the period. As this is a modern-day performance of an ancient 'lost' piece, or fragment, we felt some licence could be employed in determining the number of instruments. It might, for instance, not have been possible to glean what the intentions were of our fictional composer as the manuscript is barely complete and would most likely have lacked precise instructions. The piano, for example, takes the place of what would have been a harpsichord for practical reasons to ensure it was heard during the live recording.
The orchestra was the Malav Symphony Orchestra of Budapest, conducted by Andreas Ligeti who is something an icon in the Hungarian musical world. You will notice they perform with dedication and sensibility. One would expect nothing less from our beer.