Image: Atelier Stone, Berlin, Public domain — via Wikimedia Commons
Spharophon
| Category | Electronic (early electronic instrument) |
|---|---|
| Country of origin | Germany |
| Classification | musical instrument |
| Wikipedia | en.wikipedia.org |
| Wikidata | Q11681415 |
Overview
The Spharophon is an early electronic musical instrument designed by the German composer and instrument builder Jörg Mager in the 1920s. Like the Theremin and the Ondes Martenot, it used heterodyning vacuum-tube oscillators to produce its pitch: two high-frequency oscillators beat against each other, and the audible output is the difference frequency, which can be swept continuously across a wide range. Unlike the Theremin, the Spharophon used a keyboard-like controller with fixed divisions, allowing quarter-tone and other microtonal pitches.
Origin & History
Jörg Mager was one of several inventors in interwar Germany exploring the musical possibilities of the new vacuum-tube electronics. He demonstrated successive versions of the Spharophon from the early 1920s through the 1930s and performed with it at avant-garde concerts in Germany and abroad. Composers including Paul Hindemith and Edgard Varèse took an interest in the instrument. Mager’s workshop and most of his instruments were destroyed during the Second World War; no complete original Spharophon is known to survive, and the instrument is reconstructed today mainly from documents, photographs, and a small number of recordings.
How It’s Played
The performer operates a small keyboard that sets the difference frequency of the heterodyning oscillators; additional controls shape volume and timbre. Microtonal layouts allowed the Spharophon to play quarter-tone and other non-twelve-tone scales, which was part of its appeal for composers working on tuning experiments.
Cultural Significance
The Spharophon is a significant historical step in the development of keyboard-controlled electronic instruments. Although it was never produced in numbers, its role in interwar electronic music and its microtonal capability make it a reference point in the history of electronic instrument design.
Related Instruments
- Theremin – contemporary heterodyne instrument
- Ondes Martenot – French heterodyne keyboard relative
- Novachord – early polyphonic electronic keyboard
- Telharmonium – pre-vacuum-tube electronic ancestor
- Orthotonophonium – related microtonal keyboard
Frequently Asked Questions
Do any original Spharophons survive?
No complete originals are known to remain; most were destroyed during WWII.
What made it different from the Theremin?
It was played from a keyboard with fixed microtonal divisions rather than by hand position in free space.
Who designed it?
The German inventor and composer Jörg Mager.