Listening is clearly the weakest skill of EFL students who encounter different kinds of listening problems. ASC application was able to overcome one of the students' problems in listening comprehension. Students' scores in the second cycle dominated enough categories. This research found that students' scores dominated the poor category in the first cycle, but it reduced 35.32 points of its percentage in the second cycle. The success of a cycle was determined by using two criteria as follow: (1) students' mean score had to be higher than 75 points in the last phase of a cycle (2) there should be at least 80% of students who got at least 75 points for their final scores. An interview was used to gain information about students' responses to ASC application. An observation sheet was used to identify speed development. The test was used to measure students' achievement. There were three instruments used in this research, namely listening test, observation sheet, and interview.
It used four phases, namely planning, implementation, observation, and reflection. This research applied classroom action research of Kammis and Taggart model. This research aims to advance students' listening comprehension by using Audio Speed Changer (ASC).
One of the obstacles experienced by students of the English Study Program of STAIN Majene is the speed of spoken native language. Unfortunately, it often becomes the most challenging skill in learning a foreign language for students.
As a receptive skill, listening is very influential for students' language development.