Hi @ankit00714,
There’s a new feature released in 4.20 that allows you to record a Submix to a SoundWave asset. Along with the Audio Capture component which lets you route incoming microphone input to a Submix of your choosing, you should be able to generate a SoundWave asset.
However, to save it between gameplay sessions, I believe you’ll need to serialize it with the rest of your Game Save data. I definitely haven’t tried to do this yet; not sure anyone has. 