The roaring '20s was a period of blatant disregard for laws, boundaries, and tradition. It was also an age of invention. In 1922 a brilliant acoustic engineer named Lloyd Loar developed the Mastermodel series of acoustic instruments and invented the first solidbody electric viola. Loar was the architect of the modern stringed instrument. This collection features the entire Gibson Mastermodel series and Lloyd Loar's personal instruments, which include his electric-viola, mando-viola, and musical saw.