How to Include Audio in the Waiting Room for Dial-In Attendees
It's simple to add audio to the waiting room for dial-in attendees.
This waiting room feature lets early dial-in attendees listen to music or audio while staying on the line until the event begins. Include an MP3 or WAV file of your company’s event messaging, a catchy jingle, or other background music. Overall, it allows attendees to dial-in and wait on their mobile phone until your event begins.
How to Enable Waiting Room Dial In Audio
In your session admin head to Pages > Waiting room then click on Edit Waiting Room to get started.

The builder for the waiting room will open. Select the Video & Audio tab at the top, click Dial in Audio, then click Choose MP3 or WAV File. Browse your files and upload an MP3 or WAV file.

Now, when your attendees dial in to your event, they will hear your custom audio while in the waiting room.