How can I disable Preview.app (MacOS X) delete file sound? I. e. sound after pressing Cmd-Delete.
I tried to delete a sound file, played by Preview.app, but I haven't found that file.
You can't, kinda
If you have some kind of vendetta against that sound in general, you can just delete it from the system files. That way, deleting files will be silent.
These instructions actually modify system files, so make sure you are careful. Anything you do here can be reverted by simply 'installing' Snow Leopard over the top of your existing install. This will repair all the system components, while leaving your applications and user files in place.
Now, restart Finder by running