Guacamole uses AudioBuffer.noteOn() to schedule playback when the Web Audio API is supported, as it is with Chrome, but Chrome lacks this function as of version 36, replacing it with AudioBuffer.start(). This change is referenced ages ago in https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html
date: Tue Sep 25 12:56:14 2012 -0700
summary: noteOn/noteOff changed to start/stop – added deprecation notes
The latest specification is [http://webaudio.github.io/web-audio-api/|here] and includes no mention of the old noteOn(). Time to add support.
All current versions of Guacamole supporting sound are affected.