Free Strumming Lesson with Audio: 1 2+3 4+1 2+(3)+ 4+ admin1972 January 20, 2017 Free Online Guitar Lessons, Guitar Lessons, Strumming Comments Free online guitar lesson – strumming with backing track – simple chords. Play along with the backing track below. Another free online guitar lesson brought to you by Astley Guitar Tuition and Untidy Music.