I know the forums are petty clogged with beginners asking the same old questions, but because of the wording of my question, I can't seem to find an answer which doesn't contradict another... Little bit bit of background: I'm teaching myself to play the trumpet, which is obviously largely ill-advised, but as I'm just taking it on as a hobby instrument, as I already perform with others, I'm not really I n the position to pay for any more instrument tutoring. (I am well-versed in the Guitar and proficient with the Electric Bass and Upright, if anyone's interested, haha). So finally to the question: It is my understanding that it's recommended to place the mouthpiece on 2/3 bottom lip, 1/3 upper lip. I appear to be finding more success following the opposite, finding much more control in the octave beginning middle C. The trouble begins when I try to play above the following C, in that I canny get any clear resonance at all, which makes me curious whether this is down to mouthpiece placement. I know it's very hard to give advice on things such at these without seeing my jaw/teeth placement and the size and shape of my lips, but I've got a brick wall and would very much like to tear it down! Thanks in advance for any help!