Yes I understand. I am just beginning to experiment with various ways of forming my mouth, lips, and tongue to see how it influences the tone. I have no first-hand perspective yet other than the conventional wisdom that blowing from the diaphragm provides a better overall sound.
I was just suggesting that when experimenting–and doing this critical listening–you can hear the subtle differences in the tonality better when you let the sound bounce off a wall and reflect back to your ears.
Your hear the full tonality of the instrument when you bounce the sound off of a wall rather than let it float away into space. The sound is fuller and richer, and hence you are more inspired to play well during practice.