eqmac

Install command: 
brew install --cask eqmac

Name: eqMac

System-wide audio equaliser

https://eqmac.app/

Cask JSON API: /api/cask/eqmac.json

Cask code: eqmac.rb on GitHub

Current version: 1.8.11

Requirements: macOS >= 10.13

Analytics:

Installs (30 days)
eqmac 297
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eqmac 863
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eqmac 3,113