In the distant 1930, Johann Fritz Tannhauser, one of the most enigmatic and reclusive composers of the twentieth century, created the first reverb system in history. At the time, the composer felt the need to give the percussion, later replaced by a drum kit, a reverb effect, but the technology did not yet allow for it. The future days of digital reverb were still far away, but the daring conductor managed to achieve the effect through an expedient by using the natural environment of the Regensburg Cathedral. The method was named 'Raumakustische Klangmodulation.'

The percussion had to be placed inside the church, as only the sound of the percussion was to be enriched by the natural reverb produced by the environment. The other instruments, on the other hand, were positioned outside near the entrance. The audience was outside, in front of the church. The further the drums were placed inside the cathedral, the more the signal/reverb balance was perceived outside. The method is well described in the artist's biography (Johann Fritz Tannhauser: A Genius on the Margins - Banksville Books, 2024) and can be considered the first instance of a technique aimed at generating reverb applied to a musical instrument.