Channel Metadata docs: https://www.ably.io/documentation/realtime/channel-metadata
Channel Status API docs: https://www.ably.io/documentation/rest/channel-status
Channel lifecycle events tutorial: https://www.ably.io/tutorials/channel-lifecycle-events
Channel occupancy events tutorial: https://www.ably.io/tutorials/channel-occupancy-events
Channel enumeration tutorial: https://www.ably.io/tutorials/channel-enumeration-rest

Music: www.bensound.com