VRC7 Patch Switching Accuracy about dn-famitracker

[Gumball2415]

FamiTracker and NSFPlay uses the same emulator core for VRC7, which is emu2413 (different versions though). However, the interfaces that deal with them differ in their behavior.

[TakuikaNinja]

I see.
This is kind of related, but what is going on with vrc7tone.h (the patch dumps)?
The one in Source/APU/old/ seems to be newer than Source/APU/ext/.
Which one is actually used by Dn-FT?

[Gumball2415]

The files inside APU/ext and APU/old contain obsoleted files that are there mainly for reference of where it came from. (Might need to delete it once it's not needed)

The patch dumps Dn currently uses are in APU/nsfplay/xgm/devices/sound/legacy, which nsfplay's emu2413 uses. Currently, there's an option to switch between hardware patches, but it defaults to the hardware dumps from Nuke.YTK

[Gumball2415]

NSFPlay 2.4, j0CC & 0CC, and vanilla uses varying different versions of emu2413, which produces varying results, even with hardware accurate patches. In the latest NSFPlay commit (which uses emu2413 v1.5.2), and NovaSquirrel's Mesen fork (which uses nuked-opll v1.0.1), the exported NSF appears to sound the same as Dn's implementation (emu2413 v1.5.2).