Hi Judi, thank you for the reaction. You're not just enjoying the song but also giving valuable information that relates to the song (the technics, gestures, interpretation, etc), kudos for that! A & R is the abbreviation of Artist & Repertoire. Kind of talent scout for singers wanna-be and maintain their performance and quality after being singers. So these guys work at the A & R division at Trinity Optima Production (TOP). They are Barsena Bestandhi (the one with the green shirt), the vocal director at Trinity. He has his own RU-vid channel and often does cover songs, you may check his. Simhala Avadana (the guy with the checkers' shirt) is Trinity's A & R Manager. He used to be in a band named Numata (with his siblings) as lead vocal. Karina Dwi Sagita is well known as a worshiper/gospel singer. A fun fact about them doing the cover songs was just doing it for fun =). Following reaction maybe you can check Isyana Sarasvati x Deadsquad live performance at IDGAF 2021 (Lexicon, Il Sogno, Unlock The Key). It's a mix of opera, metalhead, and progressive rock, oddly mind-blowing. Or Isyana Sarasvati Lexicoustic episode 1-7, the acoustic version of Lexicon. Isyana is known as a multi-instrumentalist artist, an opera singer, with an academic background in music, she is just a genius. Until then stay healthy and cheers!
