Ratana is the Pali word meaning a precious jewel.
Here, Ratana applies to the Buddha, Dharma and the Sangha.  In Etymology, the syllable Ra means to attract, Ta means to cross and Na means to lead.
Buddha, Dharma and Sangha are collectively called
Ratana  because  they posses  virtues that attract the minds of the wise, act as means to cross the ocean of Samsara and they lead to heavens and Nibbana those who seek refuge in them.

1. Ratana Sutta ( Pali Chanting )25' 02"
2. Jayamangala Gatha ( Pali Chanting)

A music producer, composer, arranger and vocalist, Imee Ooi is a well known personality in the Buddhist Music scene. She was born in a musical family in Malayasia. Her grandfather plays the piano, her grandmother taught her singing and her mother is a piano teacher. Quite naturally Imee learned music early. She attained a piano degree, taught piano and spontaneously composed and arranged music.
In 1996, Imee had been inspired by the album “The Great Mercy Mantra,” which was very popular in Taiwan then, and she began to create a new genre of new-age music presenting the Sutras and Mantras. Her work has since received rave reviews and overwhelming responses. Imee has published more than 30 Buddhist albums by now, including the internationally acclaimed “The Chant of Metta” and “Om Mani Padme Hum.”
Imee Ooi’s Buddhist music is becoming an important representative in the Buddhist musical culture.