What musical instruments should be

• Not pitchy
• Connected (with)
• At the right pitch, musically: 2 wds
• Not sharp or flat
• Perfectly pitched, like a guitar's strings: 2 wds
• Ready to play
• Pitched well
• Pitched perfectly

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Intune \In*tune"\, v. t. To intone. Cf. Entune .

Wiktionary Word definitions in Wiktionary
vb. To intone.