# ISO/IEC 23003-4:2020/Amd 1:2022 — Withdrawn and superseded ISO standards

For ISO/IEC 23003-4:2020/Amd 1:2022, item title is Information technology — MPEG audio technologies — Part 4: Dynamic range control — Amendment 1: Side chain normalization; status code is 9599; successor is ISO/IEC 23003-4:2025; withdrawn / published date is 2022-07-05, recorded from its source on 2026-08-05.

- **Identifier:** ISO/IEC 23003-4:2020/Amd 1:2022 _(verified: appears in the quote below)_
- **Item title:** Information technology — MPEG audio technologies — Part 4: Dynamic range control — Amendment 1: Side chain normalization _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/IEC 23003-4:2025
- **Withdrawn / published date:** 2022-07-05 _(verified: appears in the quote below)_

## What the source says

> 82732,IS,Amd,ISO/IEC 23003-4:2020/Amd 1:2022,Information technology — MPEG audio technologies — Part 4: Dynamic range control — Amendment 1: Side chain normalization,Technologies de l'information — Technologies audio MPEG — Partie 4: Contrôle de gamme dynamique — Amendement 1: Normalisation de l’entrée latérale,2022-07-05,2,['35.040.40'],ISO/IEC JTC 1/SC 29,9599,,[89036],['en'],15,

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).