Thx. And no samples.
The main idea there was to write POKEY STEREO tune different. Instead of trying to simulate echoing on both chips and go for a well known sounds I focused on more synthish sounds, and this sometimes mean single stuff played on left POKEY. So, the second half of the effect here is when we apply some low stereo separation (30% in this case).
However under real POKEY there are slight differencies. Also many times tune done under RMT detunes much on real machine.
My tune is just a simple example. IMHO much more can be done with better player code - in this case I mean mostly synth-alike code. Look on it this way - there's already SID emulation functional for small Atari. Probably not many people found it revolutional, but it is. Using such techinques but for native POKEY music player will cost less rastertime, and with two POKEYs and a single frame player execution you might get very good results and even use it in a demo.