Copy-and-paste of reverberation: An experimental approach to sharing acoustic atmospheres

In typical sound field reproduction systems using loudspeakers, accurate reproduction is limited to a narrow listening position. This study proposes an alternative approach that emphasizes the relaxed enjoyment of the spatial impression of reverberant environments by multiple listeners, rather than precise localization. The concept aims to provide “reverberation experience compensation” for individuals who cannot access acoustically rich spaces such as concert halls. In our system, the dry signal of the core sound source is reproduced directly, while reverberation components, captured using directional microphones, are reproduced gently from surrounding speakers using pre-measured directional impulse responses. We demonstrate this method through two experimental concerts with approximately 100 attendees. In each case, the main performance took place in a standard venue, where the primary source signals were recorded, mixed to stereo, and transmitted via a low-latency protocol (e.g., MADI) to a remote playback space. There, reverberation was synthesized through convolution and spatial playback, creating an immersive atmosphere for the audience. Preliminary observations suggest that this method can effectively convey a sense of spatial envelopment without relying on strict sweet-spot positioning. Work supported by JSPS KAKENHI Grant No. JP24K03222.