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sumtozero.net, a blog by Miguel Pinheiro Marques

A blog about audio, mastering, studio design & acoustics

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Latest posts

What is a DDP? And a free, online DDP player for checking your CD master

A short guide to DDP image sets, what they are, why pressing plants need them, and how to use a free, in-browser DDP player to check PQ codes, ISRC, UPC/EAN and CD-Text before sending a master off.

Fixate:Midrange is Out

Really happy to finally talk about this one. I helped Dan at Newfangled Audio build Fixate:Midrange, and it's out today! It was really fun to be part of this from the initial idea all the way to a finished product. Go try it out!

Prepping audio cables

When it comes to building custom audio cables, soldering gets all the glory. But a reliable, lifetime-guaranteed cable is born before the iron is even switched on. Proper prepping, meaning stripping and sleeving, is what actually dictates mechanical strength and longevity.

Decoupling loudspeakers the right way

Room acoustics are the foundation of critical listening, but a loudspeaker rigidly coupled to its stand, desk or wall recruits that structure as a second, uninvited radiator. What decoupling actually does, which materials genuinely behave like springs, and how to calculate and verify the load.

Handling metadata when using Reaper for mastering

A complete guide to handling mastering metadata in Reaper. Includes region templates, wildcard tips, and a custom script for automated DDP and CD-TEXT creation.