The XXI rating provides several types of services:
- Review and correction of papers for editing;
- Guidance and techniques in music editing;
- Adaptations and arrangements for different vocal and instrumental formations;
- Audio transcription for written notation;
- Organization of courses and master classes;
- Training for specific works in musical editing (e.g. tests, transpositions, low ciphers, choir, orchestra, instrumental parts, collection or songing).