This paper presents the results of quality assessment of speech and music signals transmitted via the DAB+ system. The musical signals have been evaluated in both overall quality and some particular attributes. The subjective research was provided with the use of ACR procedure according to the ITU recommendation and the results have been presented as the MOS values for various bit rates. The speech signals were additionally examined with PESQ method. The results have shown that the assumed quality of 4 MOS, for this kind of broadcasting could be achieved at 48 kbit/s. This fact was confirmed by both subjective and objective research. The differences of results obtained for overall sound quality and particular sound attributes are discussed.
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