The paper ‘Stretch: Spectral Theory in the Practice of a Jazz Quartet‘, by Piergiorgio Pirro and Maarten Stragier is out. It shows the creative process that led to the composition and performance of Stretch, from the album fold/unfold/refold. It is open access and freely readable and listenable here: https://www.researchcatalogue.net/view/2606478/2606496/0/0