 The MPEG-1 Audio Layer II ("MP2") codec was created as part of the EU147 project.DAB was the first standard based on orthogonal frequency division multiplexing (OFDM) modulation technique, which since then has become one of the most popular transmission schemes for modern wideband digital communication systems.A choice of audio codec, modulation and error-correction coding schemes and first trial broadcasts were made in 1990.