I just recently moved into an apt and I have found trouble sticking to my normal practice routine. I usually practice once really early (6am) and throughout the day then once realy late (12am or so). I purchased a silent brass to be able to use so I do not disturb others, but I keep having images in my head of a recital I was playing the arutunian in and I was last on an hour recital. I was afraid I would get cold so I stayed in the dressing room with a silent brass and tried to keep my self warm. When I walked on stage I played so horribly I litteraly cried as I turned around to walk off. I guess my question is this...does the back pressure caused when using a silent brass make it a poor choice to use when practicing? If so, what are some other options you might suggest?