Multiple channels outputs

[ThomasLengeling]

Great cinder block, very useful !!.
I am using the block to manage all my sound files, however, I am finding it hard to add multiple channel outputs to the lib, could you point out to the correct direction to adding multiple outputs.

I added ci::audio::OutputDeviceNodeRef node to the Track data structure, like this:

https://gist.github.com/ThomasLengeling/dd0ec421898cf323afb2

then I added a new setChannel function to control the channel index output.

  void SoundManager::setChannel(unsigned int trackID, int channel)
    {
        if (mTracks.find(trackID) != mTracks.end()) {
            mTracks[trackID]->mChannelRouterNode-> route(0, channel);
        }
    }

Thank you very much

[bruzed]

@ThomasLengeling just saw this, sorry! Did you get it to work?