What instruments have the most relaxing timbre to you?

Harp

Especially in the lower range

Vibraphone

Same

Theramin

Absolutely gorgeous in its own wobbley way. There is something profoundly soothing about this thing that I cant really explain but its otherworldy, almost utopic and chronotopic

Glass Marimba

Soft mallets

Bass Marimba

Extrapolating here but I cant see how it wouldn't