The audio channel of the sound that ranges from 0 to 5. Special players are needed if it is not set as 0.
- 0: (default) Supports dual channels at most, depending on the upstream of the broadcaster.
- 1: The audio stream of the broadcaster is in the FL audio channel. If the upstream of the broadcaster uses dual sound channel, only the left sound channel is used for streaming.
- 2: The audio stream of the broadcaster is in the FC audio channel. If the upstream of the broadcaster uses dual sound channel, only the left sound channel is used for streaming.
- 3: The audio stream of the broadcaster is in the FR audio channel. If the upstream of the broadcaster uses dual sound channel, only the left sound channel is used for streaming.
- 4: The audio stream of the broadcaster is in the BL audio channel. If the upstream of the broadcaster uses dual sound channel, only the left sound channel is used for streaming.
- 5: The audio stream of the broadcaster is in the BR audio channel. If the upstream of the broadcaster uses dual sound channel, only the left sound channel is used for streaming.