Events March 10, 2023 Boulder (Colorado, USA) 40.4 Sonic Summit 2023: Acousmatic & AudioVisual Concert April 15 – 20, 2024 Boulder (Colorado, USA) 40.4 Festival 2024 March 31 – April 4, 2025 Boulder (Colorado, USA) 40.4 Festival 2025 April 3, 2026 Boulder (Colorado, USA) 40.4 Festival 2026: Acousmatic & AudioVisual Listening Room
