[Zubersoft]

If you have one device with Ravel, or you don't mind restoring the backup file on one of the devices, you can then use the library synchronization feature to add that one song. Go to Sync Library->Sync to another device, set it up so you are updating only one device, change the merge behavior to "Prompt user for decision" and then you will need to skip/ignore every single change until Ravel comes up. It will be a little tedious, but it should get the job done. 

Mike