Using old CD's are reference

[u/UnfairWorldliness882]

Can someone explain to me this.

Why the era/format also matters

A 1992 CD master was made for Red Book CD, a fixed 16-bit PCM format with no lossy transcoding step and no concept of "true peak" as a mastering concern at all — true peak/inter-sample overs only became something engineers cared about once lossy streaming codecs (MP3, AAC) made it a real audible risk in the 2000s–2010s. That +0.03 dBTP result isn't the 1992 engineer making a mistake or taking a risk — it's simply a number that had zero relevance to their format, so there was no reason to control for it. This CD rip isn't a broken master; it just predates a concern that didn't exist yet for the medium it was built for. Applying today's dBTP/streaming standards backward onto it doesn't tell you anything about your own file's target.

Yes, I know, I am a bad boy for using AI to help me master but I am trying to figure out if I am going down the wrong rabbit hole when comparing my work I am doing in 2026 to something that was made and manufactured in the 90s? Is it a waste of time to use old CD's pre-2000 or pre-2005 as reference?

[u/OldConstant1725]

I've only ever seen the +0.3 dBTP warning on streaming uploads and never thought about how that became a concern in the first place.