Extract text from Game audio files (ADPCM)
To convert ADPCM Audio files to another format, you need FMOD Studio or other Audio software.
To convert other file formats to the "Compressed Audio Stream" file type, you need software like FMOD Studio or a similar tool.
The .adpcm file extension indicates an audio stream compressed using Adaptive Differential Pulse Code Modulation. It is historically popular in hardware and applications with strict memory constraints, such as digital voice recorders, older PC software, and video game consoles like the Nintendo Wii. These files are typically handled by audio middleware like FMOD Studio, robust media players like VLC media player, or specialized extraction tools for gaming assets.
The primary disadvantage of the .adpcm format is deep fragmentation. There is no single universal ADPCM standard; common variants include Microsoft ADPCM, IMA ADPCM, and proprietary Nintendo DSP ADPCM. Worse, many .adpcm files are just raw audio data chunks stripped of standard RIFF headers. Standard audio players frequently fail to decode them because they cannot determine the necessary sample rate, block alignment, or channel count. Additionally, modern HTML5 web browsers do not support ADPCM playback, meaning you cannot use these files directly on websites or modern mobile applications.
To make the audio usable, you should convert .adpcm files to standard formats like WAV (for lossless archival of the decoded stream), MP3, or OGG (for web and mobile compatibility). Converting to WAV will restore the audio to uncompressed PCM format, ensuring it opens in any audio editor, though the original quality loss from the ADPCM compression cannot be reversed.
Because of missing headers and proprietary game engine structures, these files are notoriously difficult to open or convert with basic online tools. Often, only the original game engine or specific audio decoders can properly interpret the raw data stream. However, you can drag and drop your file into convert.guru to identify the format variant, inspect the file structure, and analyze the internal hex data. If our analysis detects a supported underlying structure or a recognized ADPCM header, safe viewing or conversion may still be possible.
Convert.Guru analyzes your ADPCM file, detects the exact format, and lets you read the text inside.
Users also converted WAV, MP3, ADP, PCM, AVI, FLAC, OGG, RAW, BIN, ACT, MP4, TXT and FSB files.
If you want to convert ADPCM file to WAV, PCM, MP3, AAC, FLAC, OGG, WMA, M4A, AIFF, OPUS, ALAC or APE, you can use FMOD Studio or similar software from the "Audio Data Compression" category. In the File menu, look for Save As… or Export….
To convert MIDI, AAC, TTA, AU, WV, DTS, MID, FLAC, RA, MP3, PCM or WAV files to ADPCM, try FMOD Studio or another comparable tool in the "Audio Data Compression" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our ADPCM converter.