 The first generation DAB uses the MPEG-1 Audio Layer II (MP2) audio codec, which has less efficient compression than newer codecs.The typical bitrate for DAB stereo programs is only 128 kbit/s or less, and as a result, most radio stations on DAB have a lower sound quality than FM, prompting a number of complaints among the audiophile community.As with DAB+ or T-DMB in Europe, FM HD Radio uses a codec based upon the MPEG-4 HE-AAC standard.