Ca trù can be performed in a wide variety of places. Ca trù was born to serve as worship singing. From serving as worship at the village communal houses and ancestor worship, Ca trù has changed into singing for entertainment at private houses, restaurants, or cabarets. In addition to these main performance environments, Ca trù was performed at the royal palace and the palaces of mandarins. At present, Ca trù is sung as traditional music. In each performance environment, Ca trù has some changes in terms of the repertoire, musical nature, or performance styles. The CD Ca trù singing (Hát Ca trù) introduces some songs that which were performed for worship and for entertainment. They were recorded in 1970 (tracks 5, 6, and 7), in 1982 (tracks 1 and 4), and in 1997 (tracks 2 and 3) and performed by the three most famous Ca trù folk artists.