I got two audio files one is encrypted and the other file is a part of the plaintext. I want to extract all the plaintext. I am using the AES-ECB mode, the size of the block is 128 bits and the start of the extracted plaintext is not aligned with the start of the cipher text. So I need to align these two audio files. I don't know how to do that and how that would help me to extract all the plaintext.