Advanced college & professional level player.

Difficulty: Very difficult or “virtuostic.”
Time: All times & “none.”
Key: Same as 6.
Tonality: Same as 6 plus atonal, quarter-tonal, and alternate systems.
Rhythm: All rhythms, plus extensive aleatoric techniques.
Range: Full professional range with “athletic” hyper-extensions.
Tessitura: Anywhere in the full range.
Clef: Any.
Dynamics: All or any.
Length: Any, but especially applies to very long works.