How would I voice "a" minor if i was playing in a c major scale. It seems like if I were to voice it in accordance to comfort I'd spell it like a "C6" chord.(like: C,E,G,A) so it doesn't seem right, is there a better voicing?
that's totally fine, (and you probably don't even need the A note) as long as there is an A note in the bass register. that is going to determine whether your chord sounds like a type of C chord or an A chord. the bass player has this power over every chord, deciding whether each chord sounds like a major chord or its relative minor. so be nice to your bass player and if possible never allow your music to be played through built-in smartphone or tablet speakers