one specific audio file (blank) which is missing in hundreds of different folders with audio samples. What would solve the problem is if I could tell macosx to copy that one file recursively into a folder and all sub- and subsub- etc folders.
You could try using commands in Terminal (in /Applications/Utilities). I came up with the following:
If there is a folder on your Desktop named "targetfolder" that contains any number of subfolders at various levels, and there is also a file on the Desktop whose name begins with "blank", then the following Terminal commands will copy the "blank" file recursively into targetfolder and all of its subfolders.
Copy-paste each line into the Terminal window, and type Return after each:
--------
cd ~/Desktop
find targetfolder -type d -exec cp blank* {} \;
----------
For safety, try this only on a copy of your real audio folder. You could drag that copy onto the Desktop and rename it "targetfolder" before trying this.
BobHarris - Would appreciate your thoughts first - does this look OK? I'm not very experienced in Unix.