> I'm going to have to look into this a bit more deeply. The audio was missing channels > (probably the extra VRC ones)
that is currently unemulated, because until a few months ago there was no easy way to add its emulation on a per-cart base. now the core is much more flexible on this aspect (see the marvels done emulating ISA cards on AT386/AT486, NuBus cards on the classic Macs 68k, and tons of expansion carts on the c64 ), but I haven't had spare time yet to implement the necessary changes for NES...