At 21:15 South African time, a radio documentary program will be broadcasted in which Lukas van der Walt, Kallie Swanepoel and a few other professionals were interviewed by Tharien Oosthuizen on the art of piano tuning. How much do you know about the work that a piano tuner or piano technician does? Or what opinion musicians have on piano tuning? You can find out for yourself by listening to the documentary program titled "Die Klavierstemmer" on RSG. . RSG is an Afrikaans radio station, and you can listen to the documentary program on FM in South Africa, or online at www.rsg.co.za/