Composer Tan Dun spreads his wings as an audience unmutes their phones

For this program — evenly split between Tan Dun’s own music and a pair of companion works by Igor Stravinsky — the composer/conductor provided a leaflet with a QR code that, when scanned, opened an audio file on your phone. (You can see where this is going.) That recording — a simulation of birdsong as produced by a sextet of ancient Chinese instruments — was intended to be deployed during an “interactive” passage of the evening’s closing piece, Tan’s “Passacaglia: Secret of Wind and Birds,” billed as a composition “for cellphone and orchestra.”