Possible Clues:

• Well-pitched?
• In pitch
• Like good pianos and engines
• Ready to play, you might say
• Correctly pitched or adjusted
• Adjusted a radio or engine
• Got your notes all right?
• "In came a fiddler . . . and –– like fifty stomachaches" (Dickens)
• Adjusted the pitch of, as a piano
• Like a good-sounding piano