i realise this is an excpetionally old topic however I thought it be pointless making a new one based on the same topic. I am looking at getting this to work in the n900 however I guess I would need to ask apt-x themselves to develop as this is not an open source codec.However according to this page it appears that the processor on the n900 is just not supported.

http://www.aptx.com/Technology-Portf...Bluetooth.aspx