From AUDIO.BMX:
Type TChannel
Rem
bbdoc: Stop audio channel playback
about:
Shuts down the audio channel. Further commands on this audio channel will have no effect.
End Rem
Method Stop()
End Method
Rem
bbdoc: Pause or unpause audio channel playback
about:
If @paused is True, the audio channel is paused. Otherwise, the audio channel is unpaused.
End Rem
Method SetPaused( paused )
End Method
Rem
bbdoc: Set audio channel volume
about:
@volume should be in the range 0 (silence) to 1 (full volume).
End Rem
Method SetVolume( volume# )
End Method
Rem
bbdoc: Set audio channel stereo pan
about:
@pan should be in the range -1 (full left) to 1 (full right).
End Rem
Method SetPan( pan# )
End Method
Rem
bbdoc: Set audio channel depth
about:
@depth should be in the range -1 (back) to 1 (front).
End Rem
Method SetDepth( depth# )
End Method
Rem
bbdoc: Set audio channel playback rate
about:
@rate is a multiplier used to modify the audio channel's frequency.
For example, a rate of .5 will cause the audio channel
to play at half speed (ie: an octave down) while a rate of 2 will
cause the audio channel to play at double speed (ie: an octave up).
End Rem
Method SetRate( rate# )
End Method
Rem
bbdoc: Determine whether audio channel is playing
returns: True if @channel is currently playing
about:
#Playing will return False if the audio channel is either paused, or has been stopped
using #Stop.
End Rem
Method Playing()
End Method
End Type
This doesn't appear to be a case of the methods for the type not being implemented but the regular commands being implemented, because the regular commands seemingly call these empty methods:
Rem
bbdoc: Stop an audio channel
about:
Shuts down an audio channel. Further commands using this channel will have no effect.
end rem
Function StopChannel( channel:TChannel )
channel.Stop
End Function
Rem
bbdoc: Determine whether an audio channel is playing
returns: #True if @channel is currently playing
about:
#ChannelPlaying will return #False if either the channel has been paused using #PauseChannel,
or stopped using #StopChannel.
end rem
Function ChannelPlaying( channel:TChannel )
Return channel.Playing()
End Function
What gives?
| 
