Gong masters unite their instruments at St Paul Church in Tartu to perform a cosmic symphony with the largest organ in South Estonia. Features improvisations and music by Hans Zimmer from the film Interstellar. Visuals include sacral light dramaturgy, lasers, and video show interpreting the music live. Instruments include gongs, organ, flat bells, singing bowls, ethnic flutes, wind chimes, and ocean drums. Performers: Tiia Tenno (organist), Lilia Märtmaa and Denis Vinogradov (multi-instrumentalists and sound therapists), Aleksandr Bachmann (light and video artist), Archy Voinoff (lasers and light). Concert lasts 1.5 hours without intermission.