The tetrahedral harp is made with a metal or fibreglass tetrahedral frame for the strings, with a wooden or fibreglass tetrahedral sound box. Metal strings or gut strings are used according to the sound required. Many different tunings such as diatonic, pentatonic and chromatic can be applied to each of the three tetrahedral faces simultaneously. Wood, metal, or bone bridges between the tetrahedral sound box and the strings are used for a different or louder sound. A harmonium can be attached to the base as in Figure 4. where (10) shows this can have a chromatic keyboard or selection of harmonium reeds that can be set for continuous drones. The attachment is built into the base of the harp and can be powered by hand bellows or an electric pump. The harp is also an electric instrument which uses magnetic pick-ups or contact microphones placed at the base of the frame, or on in the sound box. Light beams pass through the frame from the base to the vertical sides. The space and shape where the tetrahedral sound box can be a synthesizer module. By breaking the light beams the notes are sounded.
The multi-sided harp is formed from a tetrahedral frame (1-6) defining three harp faces and a tetrahedral sound box (8), located within the tetrahedral frame (1-6) and containing the triangular base thereof.
Figure 1. – Illustrates the tetrahedral framework.
Figure 2. – Shows the tetrahedral soundbox located within the framework of Figure 1. A tetrahedral sound box (8) is shown positioned within the tetrahedral frame with the sides of the tetrahedral sound box contacting the members (4), (5) and (6) define the base of the tetrahedral harp.
Figure 3. – Shows one face of the tetrahedral harp with strings tuned to a diatonic scale. The instrument has also recently been affectionately called "Tymon's Toblerone" by "Vision of A Homeland: Joe Strummer & The Mescaleros" author and friend Ant Davies.