I used to have a nanoloop cart, and I'm sure the wav channel could play four note chords, with notes on the two pulse channels and noise as well. Did I imagine that?
If not, then that makes 7 channels - 6 for notes and one noise. Is it possible to get that many with LDSJ? I've seen the tutorial on the ghost channel, but as far as I could tell, the pitch was locked to the main note being played.