[alsa-devel] routing audio stream to multiple devices

I was wondering if it was possible to route a single audio stream to multiple alsa devices or plugins?

For example, I am playing a song and want it to stream to both my sound card at hw:0 and a bluetooth device, an alsa plugin. Is this possible? It seems that configuring asound.conf only lets you route streams serially to a single device at a time. Any info would be greatly appreciated.

Thanks in advance Baek