Most accurate N64 emulator/settings in terms of sound?

[ommadawnyawn2]

I've been noticing some differences in pitch and instruments listening to YT uploads recently. 

www.youtube.com/watch?v=jD0ZlVDfs2c&list=PLBAxtRRYkz-xd4ves8cSJSuqhOhszxM1W
www.youtube.com/watch?v=6u2N7s0x4MU
Pitch difference. 

www.youtube.com/watch?v=tPhakfGboH4&list=PLABA2955DFCACBEC8
www.youtube.com/watch?v=Pm7pdLrIkbU
Hey, where'd the organ go? 

Edit:
Apparently the PAL N64 has a slightly faster clock speed than an NTSC N64, which means if you play an NTSC game on a PAL N64 it'll run at 61Hz. Likewise if you run a PAL game in an NTSC machine it will run equivalently slower. And this is enough to hear a difference in pitch though you won't see a difference. 

So that might be what's going on with the pitch differences, but not the instruments.