How do I save an Audio object (created from a recording) to DB

I’m trying to save an Audio to mongoDB using mongoose and GridFS, but i only found a way to save a file, and my object is created using a recording then recording.createNewLoadedSoundAsync(), so i have no file with the sound and i don’t think i can use the uri of the recording.
I use very short recordings so GridFS is not a must but i couldn’t find way to save the audio to the DB.
any thoughts?
(I’m in my very early stages of learning to code and especially using expo, I might have missed some obvious things/ solutions, feel free to point them out)