OS X 10.10 and later only. This script will search the Comments tags of the Music library tracks for a user-entered text string and copy the track results to a discrete playlist.
Any tracks whose Comments contain the string "Bonus Track" will be copied to a "_Comments Search Results" playlist.
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Perform search-and-replace on text in your choice of tags
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Play each track in playlist starting at user-set seconds from end
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Restore each selected track's artwork from an image file stored in its Album folder
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Search YouTube using tag info from selected or playing track
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