癒しの極上おやすみBGM：深い眠りへ誘う穏やかなサウンド

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Long playback duration

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Timer or auto-off function

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Gentle transitions

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music to relieve lack of sleep

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Stress relief

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Serotonin

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Music for a good night's sleep

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Soothing music to listen to when you're sleepy

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Music that helps you sleep better