I disagree. depends on what key you're using.
if you're referring to do re mi...etc, the correct term to use is
''tonic note''. in any key the dominating notes are the tonic and
dominant (ie, do and soh) in the bass.
Most often, in orchestral scores, timpanis are tuned according to
tonic, dominant and..... (if really required to faciliate key
changes)....sub dominant.
and your accompaniment must not be too loud
it should be played at pp piano
very hard to say, sometimes for sake of effect, the melody is
played softer than the accompanying parts.
some accompaniment method u can include
repeat the main vocal part
that's right. that's called fugueing, in imitation of a
fugue.