+
Article
Stanford University

Stanford University: Electronic Instruments

For Students 9th - 10th
This resource provides information about a number of different types of synthesizers used from 1890 to 1980.
+
Handout
San Diego State University

Sd State: Elements of Music: Media, Genre, Form Texture

For Students 9th - 10th
One of the elements of music is "Texture." This site gives the definition, which basically is the relationship between melodic and harmonic.