Bio: I am Mari Joël: singer-songwriter, vocal coach and music producer. Building a vibrant worldwide community for Harmonium and Vocal enthusiasts.

Bio: Founder of The Harmonium Evolution. Harmonium specialist and teacher.

Bio: Opera singer here! Training other singers to reach vocal freedom and stress free performance.

Bio: Opera singing, vocal technique and mental coaching for singers who want clarity, control and confidence on stage.

Bio: 美國大學聲樂教授 | 聲樂表演博士20+ 年科學教學 × 幫1000+ 學生突破聲音限制 🎯 用科學取代玄學，用系統取代天賦✨ 從「知道」到「做到」的聲音覺醒之旅