Warning! Protocol "file" used to load page in Chrome.
Chrome disables access to microphone when loading from disk, which prevents proper functionality.
You can allow working local files, if you start Chrome with the flag
'--allow-file-access-from-files':
OS X: '$ open -a Google\ Chrome --args --allow-file-access-from-files'
Windows: '"C:\>Program Files\Google\Chrome\Application\chrome.exe" --allow-file-access-from-files'
GNU/Linux: '$ chrome --allow-file-access-from-files'