What is the purpose of double bass drums and how would one play them if they need their left foot for the cymbal thing on the left?
Its probably more to do with volume and its easier to play in a faster style like that of for instance Metallica's Lars Ulrich. Quite a lot of drummers just have a double pedal set up on one bass drum these days.
Oh and btw... the "cymbal thing on the left" is called a hi-hat!! Lol
From yer old pal, a guitarist who stood in front a drummer that used such a kit and nearly became deaf,
"Normally i can't dance to save my life.
But as soon as I step in dog shit, I can moonwalk better than Michael Jackson."