Silvia Tapia Alcázar (born 8 November 1948), better known by her stage name Prisma and also known as Sylvia Tapia, is a Mexican singer, songwriter, and music teacher. She developed her artistic career mainly during the 1980s and 1990s. She represented Mexico in the OTI Festival 1986, placing second with the song "".
In addition to her career as a performer and songwriter, she has developed activities and projects related to music education and children's reading. In 1993, she received the Children's Theatre Award of the for her work .
Silvia Tapia is the daughter of Spanish musician and educator and Mexican teacher, historian, and educator Esperanza Alcázar Montenegro. In 1966, she began composing and singing jingles for television and radio commercials. In 1969, she created the musical group , and in 1977, the musical group . On 16 August 1980, she made her solo debut under the name Prisma.
In addition to her career as a performer and songwriter, she has developed activities and projects related to music education and children's reading, publishing several works.
In 1993, received the Children's Theatre Award of the .
Tapia participated twelve times in the Mexican national selection for the OTI Festival both as a singer and a songwriter; winning the 15th edition with her song "", and thus representing Mexico in the OTI Festival 1986, where she placed second.