How To Free Up Space on your Zoom Recorder SD Card Last Updated 10 October 2021 by Michael Forrest

This is a Ruby script that you can put in the root of your Zoom SD card. It does this by going through each directory and zipping all the individual tracks. If there is no “MASTER.WAV” file present, it creates a reference mix using sox.

You’ll need to have sox installed.

I’ll explain this line-by-line.

1. Gives a description to the task when you type rake -T
2. Defines the task named “compress”
3. Matches the contents of the directory called FOLDER01 and iterates through each folder
4. Changes into the directory (dir)
5. Put all the WAV files into a variable called files
6. Debugging
7. When we process a directory we’ll add a little file (I first called it .processed but this is hidden in Finder so I changed it to processed)
8. Check if we already have a MASTER.WAV or MASTER-SOX.WAV file.
9. Debugging
10. If no master file, we’ll make one
11. Show what’s happening
12. This sox command merges all of the files in our files array into a new file called “MASTER-SOX.WAV”
13. Finish with the master files
14. Collect all the WAV files starting with TRACK into an array called tracks
15. User message
16. Create a zip file called Archive.zip and add all the files from tracks
17. Trash all files in tracks now that they’re in the ZIP

You might want to comment out line 17 out before making any changes to this script

This will put your TRACK* files in the trash so while you can restore these without too many problems, you could equally use Finder to find and delete them after you’ve done all the processing

18. Create a file called processed to let the script know to skip this directory next time you run it
19. Otherwise…
20. We didn’t need to process the files
21. Finish the processing block
22. Exit this directory
23. Loop round to the next directory
24. End of the Rake task
25. Define the default rake task so you can just type rake to run the script.

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