The encryption algorithm is very important to guard the confidentiality of audio information. One of the most effective audio encryption algorithms is to use a unimodular matrix and Bernoulli function. In this research, we develop an audio encryption algorithm that uses a unimodular matrix and a Bernoulli function. This algorithm is implemented using the language Python programming. The audio data encrypted using this algorithm is capable produce audio data that is secure and difficult for unauthorized parties to decipher authorized. In addition, this algorithm also has good performance in terms of speed and efficiency.