The StereoSynthephone was an early predecessor to the modern Multi Modular instruments made popular by Opus Systems Inc™. Famed adventurer Sir Elderod Wynneflous Mackerel XI had this to say about the now legendary instrument in 1901:

"The heart of the Synthephone's signal generation lies in the patented Turbuline Occili-Rotor System™, a sophisticated series of inter-nested rotors, each perforated with thousands of precision-aligned sound holes, which when steam pressure is applied to, spin at fantastic speeds, generating virtually hundreds of combinations of tones not possible in modern electric-powered instruments. Housed in a compact and surprisingly affordable package, the Stereosynthephone is yet another veritable reminder (to those so inclined to the vile seductions of electric-powered products hitherto exported by that loathsome irk of the Continent known as France, but that is another story entirely) that Steam has, and shall always be, the superior means of propulsion."

The Stereosynthephone ceased production after an improperly maintained coal-burning model exploded, causing the destruction of a reputed London theatre, the death of hundreds of wealthy Opera-goers, and the subsequesnt fire which as an indubitable result of corruption and scandal at the highets levels of the governing party, went unabated due to"...The need to secure interests in India..."

But that too, is altogether another story.