I am in a constant quest to improve all aspects of my playing. The jobs that I get are varied and require me to develop many styles of playing and most the commonly used range of the instrument. I need some ideas on why my low notes below low C are flat and less resonant than I would like. Teachers have never mentioned it , but I know about it and want to fix it. I am not financially able nor will my schedule allow me to study with a teacher at the moment. I have spent plenty of time with the tuner trying different things with no luck. What generally causes the lower notes to be flat and less resonant? I have tinkered with varying the tightness of the corners and tongue level with no luck. Any serious and helpful comments will be appreciated.