Also, in tune with.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
How to use in tune in a sentence
One of these may be called the in-tune system and the other the under-tune system.Cyclopedia of Telephony & Telegraphy Vol. 1 | Kempster Miller