#2
Yes that's the accepted frequency for an A
My Strat/Modded '69 RI Mustang
Ovation 1117-4 c. '75
Fender Blues Jr. [JJ Power Tubes, White Grille, Warehouse Speakers Greenback Clone]
BOARDZILLA 2.0

#? of EHX Guild
#5
Unless you're in a period-correct baroque quartet, yes. I rather doubt that you are though.