Intonation issues with PAL nsfs (nsfplay vs. notsofatso)

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Intonation issues with PAL nsfs (nsfplay vs. notsofatso)
by on (#48517)
I'm not sure which is more accurate, but here are samples of the same tune (smurfs track 13) played back in each player-

notsofatso sample (lower)

nsfplay sample (higher)

I'm under the impression notso is the correct one, sharing the same pitch as nezplayer as well. They all seem to share the same speed though, so it's not as obvious as the playback being too fast for PAL or anything. Anyone know for sure?