To achieve the first purpose, the Computer-Assisted Musical Pronunciationwas constructed. It consisted of the pre-pronunciation test, 10 lessons about English suprasegmentals, and the post pronunciation test. The lessons in the computer- assisted musical pronunciation courseware consisted of content about English suprasegmentals, exercises, and songs. The contents were studied and selected. Then, the words and sentences were selected by 3 teachers who teach Business English. After that, the contents were checked for content validity by 3 experts. The music and songs were written and composed based on the content of each lesson. The next step was conducting trials of the courseware with the one-to-one testing and small group testing. The courseware was then used with the sample group. The sample took the pronunciation test. The students then registered and logged in to learn the English suprasegmentals lessons in their own time. The students studied each lesson for one hour. After the students finished all lessons, the questionnaire was sent by e-mail. The efficiency of the CAMP courseware was found to be 83.57/91.33 and the effectiveness index was 0.86.