Abstract: The method is capable of securely reading audio data from an optical disk with reducing errors. The method comprises the steps of: reading the audio data, which are divided into a plurality of data units, from the optical disk; detecting an error flag of each of the data units so as to check if a reading error exists in each of the data units or not; rereading the audio data from the optical disk and storing the audio data of the data units, in which no reading errors exist, if the reading error exists in at least one of the data units; repeating the rereading-and-storing step prescribed times; and combining the stored audio data of the data units, in which no reading errors exist, so as to reproduce the recorded audio data.