We often receive special requests for customized instruments with particular scales and ranges. At first we study each request in order to validate (or not) the feasibility of the scale and define the most appropriate diameter for your instrument. That depends on the number of notes and the layout possibilities. Please, think hard about your custom scale before asking for a study, that will avoid a waste of time.
Concerning the spacedrums, the lowest note of a custom scale can be a C3 (Do3) and the highest note can be a C5 (Do5). Below the G3 (Sol3) the bass notes are placed on the side of the Spacedrum, not on the dome. So, the 2 highest notes will take place on the dome. If we have to tune bass notes (F4 and lower) the Spacedrum’s diameter will be 23.9 in (60 cm – the largest size) for an 8 notes scale.
The making process of a custom Spacedrum is different from our usual process, that’s why these instruments are more expensive than the “regular” models (contact us on firstname.lastname@example.org for a quotation).