well, i'm playing a G bari, and i just can't get a good sound in the lower register (like a low G). i sound really airy, and i can't get a nice round sound past like a mezzo forte :( . and in the show, i play that low G in the opening chord and it's suppose to be like at fortissimo. could it be an adjustment thing from going to a G horn? i mean, i've got pretty good tone in the low register on a Bb bari. any help would be GREATLY appreciated