« Thin Peaks » is the sixth album by the microtonal tuba trio Microtub, featuring Robin Hayward (UK/Germany), Peder Simonsen (NO) and Martin Taxt (NO). Initially developed during an artist residency at Andersabo in Sweden, the two pieces « Thin Peaks » and « Andersabo » underwent several adaptations before being recorded in 2022. The pieces are inspired by the acoustic phenomena of half-valve combinations, creating distinctive timbres and harmonic spectra based on the unique signature of each tuba. While « Thin Peaks » lies between the pitches resulting from a single half-valve combination, each of the four movements of « Andersabo » results from a different half-valve combination, sometimes yielding surprisingly consonant harmonies.