Doing it by sound

Tonight I asked Griffin if he’s been keeping track of his screen-time minutes (a thing we do).

He replied, “I thought you said that we’d do it by sound.”

“By … sound?

“Yes, last night you said that we would do it by sound,” he repeated, looking entirely earnest.

<Puzzled thought.> “Ohhhh… I said we would play it by ear!

Love the way brains grapple with new idioms.