Hey hey,
I'd like to present a fully 3D mixed song: Dancing with a ghost:
Composition: Jeanette C.
Lyrics and Vocals: Benjamin Michael & Jeanette C.
Saxophone and video: Benjamin Michael (images courtesey of pixbarbay)
Mixing and production: Jeanette C.
All sounds were recorded and preprocessed in my DAW, Nama. From there every clean/source track and reverb/delay sends were processed through a basic Csound instrument, using the hrtf* opcodes with the room modelling. All sounds were placed in the same space, but with different sends of hrtfreverb .
The results, alas, tell me that I have to learn a lot more. Still, in persuing this project I already learnt a lot and think I have a few points for future improvements, like placing groups of sounds in a few predetermined spots. Only move a few tracks around for effect and have a trial run with a room to work out how much extra reverb from the DAW is necessary and most important: don't start a new idea with a project with over 100 tracks going into HRTF processing. It's a lot of CPU time and very confusing. 
Enjoy and best wishes,
Jeanette