Saw this in my F12 console while testing my game in NW.js... I have very little idea what this means, other than something in the Audio plugin will no longer be supported very soon. Is this something we need to worry about?
[Deprecation] GainNode.gain.value setter smoothing is deprecated and will be removed in M64, around January 2018. Please use setTargetAtTime() instead if smoothing is needed. See https://www.chromestatus.com/features/5287995770929152 for more details.
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I've created a bug report. Check it out and subscribe if you like: Link