Voice Sensei
Ann Z Balthazar
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Music Director for GPIB Jemaat Effatha since 2018.
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Choir Instructor for Children, Youth and Adult GPIB Jemaat Effatha since 2018.
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Conductor and Piano instructor for Effatha Junior Orchestra since 2018.
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Vocal Instructor and Piano Teacher at Indonesia Youth Orchestra from 2007 until 2011.
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Vocal instructor for the famous Indonesian vocalist Rayi Putra Rahardjo (from RAN) in 2007.
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Vocal Instructor for the famous Indonesian actress and singer-songwriter Sherryl Senafia in 2008.
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Children vocal and choir instructor for Pelangiku, a children music album released in 2003.
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Has been teaching voice lessons at Music Temple since January 2020.
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Has been giving voice lessons at Australian International School (AIS) since February 2020 as an extracurricular teacher provided by Music Temple.