The introduction of modern vocal teaching techniques will promote the change in the music curricula in East Asia. The study explores the impact of the Vocal Image mobile application on musical self-esteem in East Asian youth. Encompassing 228 adolescents and young adults, it assesses the effectiveness of group activities within an interactive educational environment. Key findings reveal that collaborative learning showed higher outcomes in musical self-esteem, though without statistical significance compared to individual sessions. The research highlights lower musical self-esteem in teenagers versus adult voluntary learners. These insights are crucial for enhancing aesthetic education quality and implementing student-centred approaches in music education, potentially influencing music programs in East Asia. This study underscores the importance of contemporary vocal training methods and their role in developing musical self-esteem within an interactive educational context.