This sound is very simple and was made by anhembi morumbi university's students on studio. You can use it for opening sounds in general, but it suits like 100% a champagne opening (in my opinion) and the one who recorded it was maria laura ligeiro cavalcanti.
Cool in Rhythmn (dedicated to Stan Kenton) is played by Theo Jörgensmann, basset clarinet; recorded live in Hamburg, Germany. Converted to ogg by Herbert Weisrock