Checks if a channel is enabled for processing.
|input||Dealing with an input channel? FALSE = an output channel.
|channel||The input/output channel number... 0 = first.
The return value is one of the following.
|BASS_ASIO_ACTIVE_DISABLED||The channel is not enabled.
|BASS_ASIO_ACTIVE_ENABLED||The channel is enabled.
|BASS_ASIO_ACTIVE_PAUSED||The channel is enabled and paused.
When a channel is joined to another, the status of the other channel is returned, as that is what determines whether the channel is enabled for processing.
BASS_ASIO_ChannelEnable, BASS_ASIO_ChannelGetLevel, BASS_ASIO_ChannelJoin, BASS_ASIO_ChannelPause, BASS_ASIO_IsStarted