jwz on Nostr: Can someone give me an ffmpeg audio filter that will reduce the hum in this clip to, ...

Can someone give me an ffmpeg audio filter that will reduce the hum in this clip to, let's say, -66 dB? This is for silence detection purposes so it should not significantly reduce the volume of music or speech, were there any.

https://files.mastodon.social/media_attachments/files/112/746/721/813/285/025/original/d5ff79ac75808bb5.mp3