2512 Covox ADPCM Audio Files Covox 8-bit audio Audio Covox ADPCM Audio Files (also known as Covox 8-bit audio) is a title for a family of Adaptive Differential Pulse Code Modulation (ADPCM) formats, used for compressing 8-bit unsigned pulse code modulation. They were invented by Covox for use with Covox sound output devices. ADPCM is a lossy compression format containing audio data that are optimized for storing digitally recorded or sampled voice data. 180 The National Archives and Records Administration / The National Archives and Records Administration 26 Apr 2022 26 Apr 2022 fmt/1676 PUID v8 File extension cvx File extension v2s File extension v3s File extension v4s File extension vmf File extension 2010 Covox ADPCM Audio Files | Covox 8-bit audio BOF; Offset: 0; Magic Bytes: 0xFF55FFAAFF55FFAA 1 Absolute from BOF 0 0 FF55FFAAFF55FFAA