Coupure audio à certains moments

J'essaie d'écouter un podcast avec les écouteurs Apple sur mon Macbook Pro (Retina, 13 pouces, mi 2014), fonctionnant sous OS X 10.10.1, mais le son se coupe constamment.

Lorsque le son est coupé, les messages suivants apparaissent dans l'application Console :

26/11/14 18:27:51,370 AirPlayUIAgent[348]: 2014-11-26 06:27:51.369515 PM [AirPlayAVSys] AirPlay became the default audio device
26/11/14 18:27:51,378 discoveryd[51]: AwdlD2d AwdlD2dStartBrowsingForKey: '_raop' Browsing service started
26/11/14 18:27:51,379 discoveryd[51]: AwdlD2d AwdlD2dStartBrowsingForKey: '_airplay' Browsing service started
26/11/14 18:27:51,407 SystemUIServer[198]: 2014-11-26 06:27:51.407192 PM [AirPlayAVSys] AirPlay became the default audio device
26/11/14 18:27:51,437 coreaudiod[597]: 2014-11-26 06:27:51.436712 PM [AirPlay] Set up for stream GeneralAudio, PCM/44100/16/2 -> ALAC/44100/16/2
26/11/14 18:27:51,437 coreaudiod[597]: 2014-11-26 06:27:51.436854 PM [AirPlay] Available DNS names: Infra [84383554262E@Julia\032-\032MacBook\032Air._raop._tcp.local.%4], P2P [intentionally disabled]
26/11/14 18:27:51,437 coreaudiod[597]: 2014-11-26 06:27:51.436997 PM [AirPlay] Pairing not required. Connect over Infra with "Julia - MacBook Air" via 84383554262E@Julia\032-\032MacBook\032Air._raop._tcp.local.%4
26/11/14 18:27:51,438 coreaudiod[597]: 2014-11-26 06:27:51.437740 PM [AirPlay] Add Peer without AWDL at MAC <<NULL>> with infra critical
26/11/14 18:27:51,438 coreaudiod[597]: 2014-11-26 06:27:51.437835 PM [AirPlay] MAC 00:00:00:00:00:00 has 0 connections, 1 require infrastructure
26/11/14 18:27:51,000 kernel[0]: IO80211AWDLPeerManager::setAwdlPeerTrafficRegistration Clearing AirPlay peer 00:00:00:00:00:00
26/11/14 18:27:51,438 coreaudiod[597]: 2014-11-26 06:27:51.438200 PM [AirPlay] Register AirPlay traffic for AWDL at MAC 00:00:00:00:00:00 with target infra critical PeerIndication=2 err=0
26/11/14 18:27:51,000 kernel[0]: IO80211AWDLPeerManager::setAwdlPeerTrafficRegistration Clearing AirPlay peer 00:00:00:00:00:00
26/11/14 18:27:51,000 kernel[0]: IO80211AWDLPeerManager::setAwdlPeerTrafficRegistration Clearing AirPlay peer 00:00:00:00:00:00
26/11/14 18:27:55,436 coreaudiod[597]: 2014-11-26 06:27:55.436424 PM [AirPlay] ### Start taking too long...continuing asynchronously

A chaque fois que cela se produit, le premier message semble être AirPlay became the default audio device mais je n'utilise actuellement aucun dispositif airplay à ma connaissance. Comment puis-je empêcher que cela se produise ?

Le redémarrage n'aide pas. De plus, je suis dans une bibliothèque, donc je ne peux pas actuellement tester la lecture audio sans casque.