New Delhi, April 5 -- A young boy singing along at their Mumbai concert is a memory that Rick Allen, 63, drummer for Def Leppard will carry with him from the legendary band's recent India tour. "This young boy, must have been about 11, was singing every single word to every single song. And then when Joe (Elliott, the lead vocalist) came back on and did Two Steps, he just started to weep. There were tears rolling down his face. He looked like he just arrived in heaven. It is moments like this that really touch us," says Allen in an interview with Lounge in Bengaluru.

As the drummer of a band that has ruled the charts for over four decades, Allen is acutely aware of music's emotional pull. "Over the years, I've realized that music is a ti...