Step1: Create meeting Room
Step2: Each room have some tools attached to it. 1st tool with camera icon reads 'Record Session'. Click on it.
Step3: Turn ON the record button and start recording.
Step4: To mute your Audio, click on the 6th tool. With this your audio will be mute.
Step5: To unmute your voice, click again over the indicated tool and with this your voice will be enabled again.