.CSMP File Extension

A CSMP file is an audio file included in a video game developed by Retro Studios, such as Metroid Prime 3: Corruption or Donkey Kong Country Tropical Freeze. It typically contains a sound effect played in the game. Some CSMP files instead contain in-game music.

Retro Studios is an American subsidiary of Nintendo. The developer is best known for creating and publishing games in the Metroid Prime and Donkey Kong Country series.

Many of Retro Studios' games use audio files saved in the CSMP format. However, different games use differently-formatted CSMP files. For example, the CSMP files included in Donkey Kong Country Tropical Freeze contain extra data that is not present in Metroid Prime 3 or Donkey Kong Country Returns's CSMP files.

You can open CSMP files and play the audio they contain in Jack Andersen's (jackoalan) custom Nintendo gaming-oriented version of Audacity (multiplatform). This version of Audacity can play all CSMP files, regardless of what game they came from.