There is evidence that music programmes can have a positive impact on people in contact with the criminal justice system. However, little attention has been paid to the potential role of music programmes as people leave prison and re-enter the community. Providing support for former prisoners 'through-the-gate' is important to aid resettlement and reduce risk of reoffending. This paper presents research on a programme called Sounding Out: a two year, London-based programme, providing ex-prisoners with longer-term rehabilitative opportunities upon their release to bridge the gap between life inside and outside of prison. The study aimed to understand the impact of the Sounding Out programme on ex-prisoners from the perspective of participants, staff and family members. Semi-structured interviews took place with 17 people: 10 participants across two Sounding Out projects; six members of staff - three from the Irene Taylor Trust, two musicians, and one former prison worker; and one family member of a participant. The research provides an understanding of the impact of involvement in a carefully designed programme of music creation, skills development, and work placements. Thematic analysis of the data resulted in three key themes: personal impact; focus and direction; interpersonal relationships. The findings are consistent with the body of research that demonstrates the impact of music programmes on prisoners.