Can I set the audience to have broadcast permission by default?

In Digital Samba, the ability to grant broadcast permission to the audience is set at a "per account" level as opposed to via API. This can be done by enabling the Allow Broadcast permission for Audience.

Sessions created within that account will then be pre-configured to grant all audience members broadcast permission. If you would like to have different sets of permissions for different rooms, you would need multiple Digital Samba accounts.