An approach is presented which provides a structural segmentation of Irish Traditional Music. Chroma information is extracted at certain locations within the music. The resulting chroma vectors are compared to determine similar structural segments. Chroma is only calculated at 'set accented tone' locations within the music. 'Set accented tones' are considered to be impervious to melodic variation and are entirely representative of an Irish Traditional tune. Results show that comparing 'set accented tones' represented by chroma significantly increases the structural segmentation accuracy than when 'set accented tones' are represented by pitch values.