The Best Piano Services in Bangkok, Thailand. Pro Piano Tuner is a piano tuning service based in Bangkok, Thailand. In addition, also offers piano repair services. Our main area of service is in Bangkok. However, we also accept piano tuning requests from outside Bangkok. For example, Hua-hin, Pattaya, Chon Buri, and etc. We also accept international clients from outside of Thailand. Since the piano tuning procedure is the same between an Upright and a Grand piano, we charge a standard price of ฿2,400 Thai Baht for both piano types. However, this price is applicable for clients in the Bangkok Metropolitan areas only. But outside Bangkok clients can contact us to get a price quote.