I have looked at a lot of templates over the years, and it occurs to me that most people seem to be familiar with the "lastplay" parameter when used with a time specification, such as Lastplay > 5 hours or Lastplay > 15 days. However, there is also another option, which will select tracks that have NEVER been played. This is LASTPLAY UNSET. You can add a combination of two parameters as in (Lastplay unset or Lastplay > 15 days). This will sprinkle some never-heard-before tracks through your sound hours to add some interest and exercise ALL the music in your collection.