Way to mute all sound from the webpage about roll-call HOT 4 CLOSED

I just made this small change 3a3403b

It makes all user output flow through one audio node.

Now you can mute it by doing:

masterSoundOutput.volume(0)

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is there any issue with memory leaks? Its possible someone could forget about the page and leave it for a long time. Just spit balling here. Chrome by itself usually crashes my computer so. :P

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We don't buffer anything that I know of into memory.

Even when the recording is on we write the recording to a File object in the browser to avoid this. Does profiling show it leaking memory?

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i'm interested in ideas for what we could consider the "monitor" audio.

adding another peer-like element seems extreme. i can't easily think of a way to add it and keep things simple.

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