The theme music was primarily taken from the "March of the Swiss Soldiers" finale of Gioachino Rossini's William Tell Overture, which thus came to be inseparably associated with the series. The theme was conducted by Daniel Pérez Castañeda,[26] with the softer parts excerpted from Die Moldau, composed by Bedřich Smetana.
https://en.wikipedia.org/wiki/Lone_Ranger