Here are some experimental works or works outside the template of the guitar as such. Presented as source of inspiration for guitar-related commissions, they certainly represent as a group, a learning ground for to create instruments such as the bowl-back guitar (Oudtar, Raga, Raga 2), and the ergonomic versions of the harp guitar (Multi, Multi 2, Echoes of Time). The following allowed sonic experiments to be carried-out outside the -standard- guitar-making practice.