The study aimed to investigate how students in lower secondary schools in England perceive the subject of music in terms of its importance and enjoyment. Following findings from the first survey phase of the project, it specifically sought to shed light on the reasons why the majority of students decide not to choose music as one of their optional subjects at GCSE level. The paper presents interview findings with students in three schools at the north-east of England following the phenomenographic method of data analysis. Among factors found to impact on students' decision to continue music at Key Stage 4 (ages 14-16 years) were the desire to spend more time learning music, having more choice and autonomy in the classroom, having more information about the content and requirements of GCSE music, feeling disadvantaged due to not being proficient at instrumental playing and having a limited perception of their own musicality or perceiving music as being elite or difficult. The findings are discussed in terms of their practical implications for the teaching and learning of music in secondary schools.