Issue 375978 :Support AGSM audio codec https://code.google.com/p/chromium/issues/detail?id=375978#c12
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Chrome can play many audio files directly within the browser. We want to play VoiceMail files natively within Chrome without downloading and playing in yet another application.
You may notice these WAV files have an all CAPS filename extension
when asterisk sends them out.
Chrome 46 on Windows 7 still does not play GSM610
WAVE form Registration Number (hex): 0x0031
Codec ID in the IANA Namespace: audio/vnd.wave;codec=31
WAVE form wFormatTag ID: WAVE_FORMAT_GSM610