The W3C Audio Working Group has removed the doppler effect from the PannerNode as part of the rework of the PannerNode. The methods panner.setVelocity() and listener.setVelocity() and the attributes listener.speedOfSound and listener.dopplerFactor are now no-ops and will be removed in Chrome 55, around November 2016.
Docs: https://github.com/WebAudio/web-audio-api/issues/372 http://webaudio.github.io/web-audio-api/#the-audiolistener-interface http://webaudio.github.io/web-audio-api/#the-pannernode-interface