Look at any street corner in Galway, Dublin, Cork, London or New York and chances are, you’ll be met with crooners, folksters, dancers, trad musicians and poets. Some of the world’s best loved performers came to fruition through busking. B.B King was a busking youth before starting a career in recording and performing on stages worldwide. So too were Tracy Chapman, Glen Hansard and Laraaji. On a quieter end of the spectrum falls Michael O’Shea, the compelling Irish busker who travelled Europe, Africa and Asia, crafted his own instrument and whose singular contribution to recorded music has just been re-released…