The hamograph a new amplitude rhythm control device for the production of electronic music

The Hamograph was designed and built to fulfill the need for a practical and relatively inexpensive means for controlling the rhythm and dynamic envelope of raw electronic sounds, as a tool for the electronic music composer. The machine consists of control loops of variable speed, which carry the rhythmic and envelope message in the form of conductive contours, read by a series of contacts of graduated resistance, which in turn modulate the signal voltage. Any type of sound may be subjected to such control which results in a wide variety of musical textures and melodies. Corrections can be made easily, and the number of splices required for a total electronic composition is materially reduced.