I have several files from my ancient iMac G3 that have no file extensions. They were from a text program that also recorded voice, and read text. It came with the computer, but that was 2 computers ago, and I have no idea the program name, or file extensions.

Each file had an audio track in it of my daughter as a child, and I would like to be able to convert them, or at least hear them. How can I listen to those audio files ?

  • Get Info on one of the files. Is there any additional information about this format? If you right click on one of these files, do you see the option to Show Package Contents? You might want to try Audacity or VLC media player to see if they recognize the file format. Stretch your mind to remember the app name! – IconDaemon Nov 16 '19 at 0:30

https://recording.org/threads/optimizing-imac-for-audio-recording.10348/ Is it Digital Performer ? Also, make a backup of all audio files and perform experiments on a new copy.

Raw files can have a wide range of file extensions, common ones being .raw, .pcm, or .sam. They can also have no extension.


So you can rename one of the files to add the extensions like

  • .raw files can really contain anything, the extension really provides no clue.

  • .sam files are by far the most common raw file one can encounter, these are 8-bit signed PCM. They were employed extensively along with EA IFF 8SVX files as samples in Amiga tracker software.

  • .pcm files might provide a clue that the file contains linear PCM, as opposed to encodings such as the various types of delta and companding encodings and compressed streams, this could still be any bit depth and ordering.


Other than that, use some audio software like Audacity which supports importing raw formats.

The two most common uncompressed file types you will encounter are WAV and AIFF.


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