rattling of the wind
籟 centers on the sound of wind, specifically a soft rattling or rustling noise, often associated with bamboo or natural hollows.
籟 combines 竹 (bamboo) with 賴, which likely contributes the sound. The character originally referred to a bamboo musical instrument or the sound of wind through bamboo.
Bamboo 竹 at the top and 賴 below: imagine wind blowing through a bamboo grove, making a soft rattling sound as the stalks knock together.
For ライ, picture a gentle wind rattling the bamboo, making a sound like a soft sigh: 'rye' -> ライ, as the wind whispers through the grove.