`setChannelCount` when using `SoundBufferRecorder`

[mgrojo]

When using SoundBufferRecorder, how is one supposed to set the channel count?

My impression is that, either a function sfSoundBufferRecorder_setChannelCount function is missing, or there should be a way to get a SoundRecorder from a SoundBufferRecorder in order to call sfSoundRecorder_setChannelCount.