This issue of Organised Sound focuses on mapping in computer music. Unlike many issues of the journal, all articles in this edition are related to the theme. The call for contributions resulted in a significant collection of work which covered a broad range of activity in the field. This number of articles would normally fill more than one issue of the journal but we decided to keep the collection together as a representative body of work.

We were delighted to welcome Marcelo Wanderley as Guest Editor for this issue. I would like to thank him for his hard and diligent work throughout the preparation of this issue.