For macOS 10.12 and later only. This script will float alongside iTunes and continuously monitor it for a single track to be selected and display that track's file path (if it exists); or the script can be set to likewise display the file path of each playing track. Includes Show in Finder and Copy Path to Clipboard options.
The file path of the selected track will be displayed.
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Copy chosen tag info from one set of tracks to a different set of tracks
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Perform search-and-replace on text in your choice of tags