Apparatus for interpreting audio materials in the form of a music piece consisting of sections, the apparatus comprising a storage memory materials associated audio sections, a central processing unit connected to the memory, a program computer for controlling the apparatus and a mixer and decoder for mixing and decoding into sounds the audio materials, wherein the audio materials are played in an improvised manner by means of the computer program (3), so that different predetermined sequences (21 ) of the sections are stored in memory (1), the audio materials (31) associated with the sections are sorted into at least a predetermined group (23) for each section, so that said group or groups (23) are formed according to simultaneously audio materials interpretable (31) and wherein by the computer program (3) is selected secuenci to (21) delas random sections then selected in succession the sections of the selected sequence (21) and for each selected section one group (23) of the audio materials (31) is randomly selected for interpretation .
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