pattern & song can play at the same time nf-a06j ← Beads

Twinned from https://github.com/cfsh/ninefold/issues/108 by tools/beads/import_github.py's reconcile pass.

If I press square inside pattern it starts looping, then I can focus up on song view and press square and the song starts looping, both overlapping.

if any loop is playing square should stop it rather than playing what's in focus