#a Time-Variant Reverberation Algorithm for Reverberation Enhancement Syetem The reverberation algorithm is usually an LTI system. The room in the concert hall does not change, so the response does not change over time. However, this can lead to colouration and instability due to feedback caused by the close proximity of the microphones and speakers. Some time-varying systems can solve this problem. This paper implements a new time-varying variable reverberation algorithm on bela, based on a combination of delay-line, lowpass filter and comb filter and feedback, for reverberation enhancement systems. Such systems can often be used in electroacoustically enhanced rehearsal rooms. This particular application is briefly outlined, and other possible applications are discussed while the shortcomings of the experimental approach are analysed.