2018 Retail Market for Musical Instruments Industry in the US Industry Market Research ReportThe Retail Market for Musical Instruments is tentatively moving forward, hitting a sweet note over the five years to 2018 as a result of the positive performance of the wider economy. Industry operators participate in the sale of musical instruments and their related products, such as sheet music and CDs. Not included in this industry are sales of audio and video equipment such as microphones or studio equipment like mixers and turntables, as well as services such as instrument repair and rental.