v3.0-rc6

• Fixed a bug causing Hearing Loss to be very quiet. This was caused by the Calibration parameter erroneously being marked as a bool instead of a float, causing its value to be 1 instead of 100.
• Update Unity version in demo scene to 2019.4.40f1

Note: Even with spatialization disabled, audio outputted from Unity still appears to be slightly quieter than other applications. You may wish to apply some gain to the master mixer to compensate for this.