here's the tab:
T T T T T T T T T T T T T
------------------12-14-15-17-15-14-12-----------------
-7-8-10-12-13-15-----------------------15-13-12-10-8-7
where i put 'T' do i need to just tap the string or do hammer. cause when i do hammer it sounds very quiet (especially on 15 and 17 fret) and when i tap string it sounds much louder.
what's tehnically right?