Once the web conference starts, you will notice a Call Using Computer button; this is how you connect to the audio conference to speak to, and hear the instructor. Click on Call Using Computer:
You may need to test your audio settings to ensure that you have selected the correct audio input and output devices:
You can also access the speaker and microphone test by clicking on the Audio button on the right side of the window:
If you still cannot get your audio to work, please call WebEx support at: 1-866-229-3239.