Many of Isham's users are not affiliated with Harvard University.
If such a user needs wireless access, it can be arranged by an Isham (or other Music Library) staff member. Access can be granted on the spot or in advance.
Instructions are found here: https://harvard.service-now.com/ithelp?id=kb_article&sys_id=bde6891437d732803dc68ff1b3990e8a