What key opens a song but not a door? - Answer & Hint

What key opens a song but not a door?

Type:What Am I?SchoolMusic

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Hint: It helps decide how music sounds.

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The answer is

A musical key.

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A musical key sets the tonal centre of a song rather than opening a lock.

#what-am-i Type: What Am I?Topic: SchoolTopic: Music#music#wordplay#classroom

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A fire drill.

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A calendar.

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