Lintian Fixes - octave-audio
The packaging branch (https://salsa.debian.org/pkg-octave-team/octave-audio.git/,branch=master) is accessible, but does not contain a debian/control file.
This may be because the Vcs-* URL points at a branch that contains the upstream sources, rather than the Debian packaging.
You can update the Vcs location on vcswatch.
Run locally
Try this locally (using the lintian-brush package):
debcheckout octave-audio
cd octave-audio
lintian-brush