Hi guys, after alot of discuusion with friends and collegues in the band and other musical faculties I decided to ask this question here.. How much practise should be done in the upper register to achieve openess and clarity of sound etc.. I had been playing long tones of slow 12 -16 beats from G to top C chromatically every day in my practise routine but was told that this is too much and to take it back!!.. but surely to increase clarity of sound and stamina in this region you need to practise in this upper area?? Yes I do alot of lip flexibilty of 2 octaves etc but can some of the players on here give advice on this question. many thanks.