The family a factory template belongs to, or undefined for an id this desk does not know.
The channel's instrument field stores the SPECIFIC template id (which horn, not merely that
it is brass), so every consumer that reasons about the family has to make this hop. It is here,
once, rather than in each of them: a second find over the table is a second answer waiting to
disagree. undefined is a real answer — an unassigned channel, or a session written by a desk
carrying templates this one does not — and callers treat it as "no prior", never as a default
family.
The family a factory template belongs to, or
undefinedfor an id this desk does not know.The channel's
instrumentfield stores the SPECIFIC template id (which horn, not merely that it is brass), so every consumer that reasons about the family has to make this hop. It is here, once, rather than in each of them: a secondfindover the table is a second answer waiting to disagree.undefinedis a real answer — an unassigned channel, or a session written by a desk carrying templates this one does not — and callers treat it as "no prior", never as a default family.