Windows Voice Recorder (built-in — search Start menu)
Mac/iPhone Voice Memos (built-in)
Any browser vocaroo.com (free, no install)
Better quality Audacity (free download)
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Find a quiet room — close doors and windows, turn off fans and TVs.
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Record 1–3 minutes — minimum is 10 seconds, but more gives a richer, more accurate clone.
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Phone works great — hold it 6–8 inches from your mouth, or prop it nearby.
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Read naturally — the warm, expressive voice you use with your child is perfect.
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Vary your tone — excitement, whispers, different characters all help the clone.
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Avoid background music — it confuses the AI. Silence is ideal.