The mechanical royalty amount owed to the publisher per song for each copy of the song that is distributed and/or downloaded. The rate per song is often based on a statutory rate set by the Copyright Statute (which is currently 9.1¢ per track or 1.75¢ for each minute of playing time, whichever is greater), but there are exceptions in which the rate per song is less than the full statutory rate. See below for more about statutory rates.
