A professional who writes score for orchestra, band, choral group, or individual instrumentalist or vocalist. Responsibilities include:

• Transposes music from one voice or instrument to another to accommodate particular musician or musical group.
• Scores composition consistent with instrumental and vocal capabilities, such as range and key, using knowledge of music theory.
• May transcribe composition to adapt it to particular style (arranger).
• May copy parts from score for individual performers (copyist).