u/Equivalent-Crow-599

Hello, as the title says, I'm wondering how I can apply the range I've "built" from exercises and apply it to my actual playing in a musical sense. To be more clear, I have been working on range, and have worked up to about a solid D, that I can hit every day. However, when it comes to playing music with notes such as D, they never seem to come out. This especially happens when I have a long phrase before a note at that range. Could it be that I'm too tense? Trying too hard? Not using correct technique? Any advice would be greatly appreciated. Thank you in advance!