Use "low-keyed" in a sentence

1. Jules cleared his throat and said in a low-keyed voice:

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2. Adu then drew himself closer to Ethan and said in a low-keyed voice, trying to sound condescending:

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3. Ethan put on a mocking smile and said with an unusually mellow, low-keyed voice, “Well I’m not all that happy about the two of you, don’t mind me saying

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4. it was a low-keyed affair

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5. understand the term, it had to be rather a very low-keyed affair, most

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6. We have worked hard to stay low-keyed about this place

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