Ambassel scale
The Ambassel scale is a pentatonic scale widely used in the Gonder and Wollo regions of Ethiopia.
The notes of the scale are C, Db, F, G and Ab. It can be viewed as a pentatonic subset of the Phrygian scale on intervals 1, 2, 4, 5, 6 or as a mode of the Hirajoshi scale.
The scale is used in Ethiopian music for songs with historical themes. It can be heard used on the song "Ambassel" by Abate Berihun and Yitzhak Yedid on their Duo Ras Dashen album.