In recent VRChat build, Audio Reverb Zone changed behaviour and no longer echo back self voice.

All voice testing world seems stop working.

Currently we can not test our voice by hearing echo.

We need alternative method to test voice.

Echo back voice test function is needed for check:

* correct audio device is used.

* not noisy.

* not too loud and not too silent.

* not splitted by VRChat's noise gate.

* some effect correctly applyed (if used)

Almost voice chat applications (Skype, Discord, Teams, etc.) has echo/talk back voice test function.

So VRChat should have that I think.