The only warning I have is that I may have to change the tempo map on a song or two since the tempo maps are usually based on the drums, which I will be charting. I’ve seen plenty of FoF charts that have time signatures and such to match guitar, then discover they have to be changed to match drums.
A lot of FoF charts don’t have any time signature, that’s the issue. But time signatures are the same of any instrument: they dictate how many beats there are per measure and “how long” is a beat, which is true for any instrument.
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