sentences:  After 1950, however, the aluminum piano plate was no longer used by piano manufacturers.As soon as aluminum was available in the late nineteenth century, people began experimenting with making new or improved musical instruments, but it was not until the 1930s that companies began to consider mass-producing them.At that time Joseph E. Maddy, founder of the Interlochen School of Music, (now the Interlochen Center for the Arts), requested that Alcoa experiment with manufacturing an aluminum violin and string bass.