Orchestra version : I Sol (G) - II Ré (D) - III La (A) - IV Mi (E)
Solo version : I La (A) - II Mi (E) - III Si (B) - IV Fa# (F#)

Obligato strings are based on an exclusive new core material, along with advances in manufacturing techniques, resulting in the true warmth and complex overtones of gut core strings with the stability and quick response of synthetic core strings. Obligato has also demonstrated quick break in time, exceptional projection, and unusual durability.

The development of the new OBLIGATO bass strings is based on an exclusive new core material, along with advances in manufacturing technique. The result is an ideal blend: the proven sound characteristics of PIRASTRO gut strings along with the advantages of synthetic based strings (stability in tone and quick playability).