Followings are the options to adjust best audio quality for Virtual Classroom:-
For Acoustic Echo Cancellation Mode, select one of the following Mode:
1. Full Duplex
Enables multiple users to speak at one time. If echo feedback results, select another option (this option is preferred for most systems).
2. Half Duplex
Enables only one user to speak at a time. Use this option if microphones on your system are unusually sensitive (transmitting unwanted background sound) or if you have poor echo cancelation.
cancellation operates in low-echo mode, assuming that both parties are using a
headset. This mode removes the minimal echo that could leak from speaker to
All enhanced audio functionality is turned off.
5. Speaker Mute
Echo cancellation is turned off but other speech processing functions (such as noise reduction) are enabled.
Specify the echo path (in millisecond) used for echo cancellation. Using longer echo path results in better echo cancellation at the price of longer delay and more computational complexity. Default value is 128 (recommended). Other possible value is 256.
The silence Level property specifies the amount of sound needed to activate the microphone. If the amount of sound is below the specified value, Audio will not transmit.