Delia Rigal was a singer of very varied quality. This recording covers a set of records made in Buenos Aires in the early 1950's and a number of tracs from concerts in the 1960's and early 1970's. the Argentine recordings are not very good but they do show her in good voice and interpretation. The later recordings show a worn, rather tired voice. If you buy this, concentrate on the Buenos Aires set, they show what Bing heard when he made her a Met mainstay.