Hey Product Hunt! 👋 I'm a musician from Berlin, and this tool was born from frustration. Every time I finished a track, the mastering step felt like a roadblock. Professional mastering costs $50-100 per track. Online services either sound robotic or require endless tweaking. And my DAW's built-in limiter? Let's just say Spotify wasn't impressed. So I built what I actually needed: **The problem I solved:** - Streaming platforms normalize loudness differently — get it wrong and your track sounds quieter than others - True peak limiting prevents codec distortion (that "crunch" you hear on loud tracks) - Genre matters — Jazz needs breathing room, Metal needs punch **What makes this different:** - Picks settings automatically based on your genre + target platform - BPM-synced compressor (release time follows your track's tempo) - 8× oversampling limiter (most DAWs max out at 4×) - No account needed, files auto-delete after 14 days **Built with:** - FFmpeg for audio processing - Java/Spring Boot backend - Web Audio API for instant preview This is 100% free — no premium tier, no limits. Just musicians helping musicians. I'd love to hear: - What genres do you produce? - Any features you'd want added? - How does it compare to your current workflow? Drop your tracks in and let me know what you think! 🎸 --- Tagline suggestion: "Free automatic audio mastering for Spotify, YouTube & CD — no signup" Topics: Audio, Music, Productivity, Developer Tools, Open Source

Free Online Audio Mastering Tool

Free Automatic Mastering Tool

Free Automatic Mastering Tool