Advanced Music Theory Expert opinion Letter from USA

I need an expert opinion letter for advanced music theory. The letter should be from a recognized authority in the music field preferably with a PhD in music or related and should include:

- Assessment of my advanced music theory knowledge
- Insights into my understanding of complex concepts
- Evaluation of my analytical skills in music theory
- Professional credentials of the evaluator

Ideal skills and experience:
- Expertise in advanced music theory
- Experience in academic evaluation
- Professional recognition in the music industry
- Strong writing skills for formal documents