Paris-based musician Seijiro Murayama (percussion, voice) and French alto sax and organ player Jean-Luc Guionnet have performed together on a regular basis for many years and released numerous recording of their collaborations. Their duo CDs "Mishima, Day & Night" (2015) and "Idiophonic" (2018) were released on the Ftarri label, and the CD "Blue Mistake, Red Mistake" (with Yan Jun, Guionnet, Matija Schellander and Murayama) came out on on Ftarri’s sister label Meenna in 2020.

"Balcony Inside"’s single track documents a live performance (50 minutes, 55 seconds) in a church in Berlin in June 2023. Murayama used snare drum, cymbal and voice, while Guionnet played the pipe organ. Each musician produced his own sounds, leaving occasional intervals of silence. Together with the rich reverberation supplied by the church’s acoustics, they gave a superb performance that filled the space with subtle and mysterious beauty.