Extract text from Nintendo 3DS audio files (IDSP)
To convert IDSP audio files to another format, you need vgmstream or other Audio software.
To convert other file formats to the "Console Game Audio" file type, you need software like vgmstream or a similar tool.
The .idsp file format is a proprietary Nintendo audio stream primarily used for the Nintendo 3DS. Game developers use it to store endless background music tracks and sound effects using compressed DSP ADPCM audio.
Game modders and data miners often extract these files from console ROMs. To open or convert them locally, users typically rely on open-source plugins like vgmstream or professional audio software such as MAGIX Sound Forge Pro for variants wrapped in a RIFF container.
Users need to convert .idsp files because they are completely proprietary and isolated to the Nintendo ecosystem. You cannot play an .idsp file on a web browser, smartphone, or standard media players like iTunes or Windows Media Player without specialized console audio plugins. It is a closed format that prevents easy sharing or listening outside of the game hardware.
The best target formats for conversion are WAV for lossless editing or MP3 and OGG for broad compatibility. Note that converting to these standard formats will permanently destroy the game-specific "loop points" embedded in the file, which dictate where the track seamlessly repeats.
This file format is difficult to open or convert because standard audio decoders cannot parse Nintendo's proprietary ADPCM compression algorithms. Often, only the original game engine or community-built reverse-engineered decoders can properly read the audio data. Just drag and drop your file to convert.guru to identify the format, inspect the file, and show internal RIFF container data. If our analysis detects a supported embedded audio track, viewing or conversion may still be possible.
Convert.Guru analyzes your IDSP file, detects the exact format, and lets you read the text inside.
Users also converted NUS3AUDIO, WAV, M4A and 8SVX files.
If you want to convert IDSP file to WAV, you can use vgmstream or similar software from the "Game Audio Storage" category. In the File menu, look for Save As… or Export….
To convert files to IDSP, try vgmstream or another comparable tool in the "Game Audio Storage" 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 IDSP converter.