Ganesha festival has started with round of dhol, tasha, dolby surround system, etc. Dolby sound systems are very harmful to people with heart problems. Mandals playing Dolby system will be booked, said Amarnath Reddy DCP. Dolby systems are very costly, they start from 50,000/- to 4 lacs, every mandal cannot afford Dolby systems. Expensive Dolby systems are making way for traditional instruments. This will indeed popularize traditional instruments & will not create nuisance at public places.