#1
I'm just learning guitar, and I've noticed that some songs have alternate tuning requirements. I was just wondering if you have to adjust your tuning for this or if a capo placed in a particular spot would achieve the same thing?
#2
If it's down tuned or drop tuned you'll need to tune your guitar. Which isn't hard (unless you have a floyd).
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#3
depends on if it is higher or lower say for instance if its metal you tune down

or if you search the chord tab for the particular song its usually 9 out of 10 times it will tell you if a capo is used and where to place it
#4
if your just learning to play there are a few books out there with nothing but tuning i say try em all and see what works and what dosnt. after a few hours of practicing you will find what you like and then you can decide what songs you want to play that have that tuning.
Im gonna pistol whip the next guy that says shenanigans !!!!