Hi,
on Debian with jack 4.0+git20241202.3410dc1 the -h help lists the -Q option as
--no-query-now, -Q
don't do metadata query when starting
while the manpage gives
-Q, --query-now
It seems that -Q will query, as will --no-query-now, and sometimes it takes a very long time to query databases, coming up with no results ("MusicBrainz did not return releases") for unknown CDs. It would be helpful to have a command line option to not query at all up front. At current, I am much faster with shutting down networking before running jack to get around this problem.