Ask HN: Best Open Source Tools for Audio Analysis on Web?

I'm looking to explore the latest technology for performing audio analysis on the web, both on the frontend and backend.

Specifically, I'm interested in open-source solutions that can:

Extract stems from audio files

Identify genres or moods

Separate different tracks or elements (e.g., vocals, instruments)

Analyze and generate metadata or insights from audio files

The goal is to automate and enhance the experience for users who upload their music or audio files by extracting useful information that can help them optimize their content. Are there any cutting-edge tools, libraries, or frameworks in the open-source space that you would recommend?

Additionally, if anyone has ideas on other ways to leverage audio analysis for music producers or content creators, I'd love to hear them. Features like automated mix feedback, real-time audio enhancements, or even AI-driven suggestions could be really impactful.

Thanks in advance!