It is her PhD research that sought to reinvent harmony in electroacoustic music through the work of William Sethares that has led to this symposium. Her research funded by Kulturbryggan, Statens Musikverk and Helge Ax:Son Johnsons Stiftelse led to the original Beyond Pythagoras compositional project (https://beyondpythagoras.wordpress.com), to this symposium and the publication of selected papers in this journal edition. Sundin’s paper documents her theoretical research and on-going collaboration with Monty Adkins, Jonny Axelsson and Adrian Geirakowski.