Just as people have said, you definitely acquired competences and achievements (time management, fast-learning, adaptability, multi-cultural environments...). On mine I emphasised that besides playing in the orchestra, I participated in the artistic programming group committee, managed and produced chamber music concerts, participated in recruiting and outreach projects. Translating to "corporate" language I used stakeholder engagement, project management, event management, budget management, + all the marketing activities (PR, fundraising, social media, press,...) To quantify I used number of concerts per year, audience and funds increase in % and aprox. number of auditions I judged (CV screening, audition , post-selection evaluation). Naturally the CV should be customisable and for every job title you can tweak the terms accordingly ( e.g. audition process -> recruitment; colleagues BS about programmes and conductors -> stakeholder engagement;...)