Nowadays, information security is a more important topic in ICT and related to all areas. Cryptography is the science that studies a wide range of issues in the transmission and safeguarding of information. Steganography is the art and science of embedding hidden messages in such a way that no one knows the existence of the message in the cover media file. This paper presents a combination of cryptography and steganography to hide information in the cover media file. In the cryptography part, AES algorithm is chosen and the audio file is used as a cover media file in steganography part. In this paper, the information is encrypted firstly and then encrypted texts are hidden into an audio file. The use of one secret key and cover media file is more secure than the use of one secret key. The first key is used for message encryption and the second audio file is applied as cover media file for information hiding.