The Spanish Easo Choir ("Easo Abesbatza" is Basque language) was founded in 1940 in San Sebastian as a amateur choral group for lower-range male voices, to spread the knowledge of Basque popular music, has attained prestige in its interpretation of a wide range of choral song.
Also collaborate with female chorus Coro Maitea. Historically some members became from Orfeón Donostiarra. Remains as amateur chorus since it was founded.