The instrument
The Logan String Melody is a portable string synthesizer that was designed by Giuliano Costantini and produced in two versions from 1973 to 1982. Manufactured in Italy, it was sold both under the Logan brand name and as a Hohner and Vox product.
The first version has a button labelled Orchestra, which has hardwired settings and disables the faders for the string sounds. The second version, String Melody II, introduced in 1977, added more buttons for more hardwired settings. (Source: Amazona)
Details
The keyboard consists of four octaves divided into two nearly equal ranges. In each of these ranges, a combination of three string sounds can be mixed with the faders cello, viola and violin. Each string sound is one octave wide. In addition to the separate fader sets for the string sounds, each section has a sustain and release fader. The lower section also contains a simple monophonic synthesiser controlled by faders labelled Bass and Perc.