From 7c4b6558bc04a23dc8e37b4d78ca0a05cb12cbbd Mon Sep 17 00:00:00 2001
From: David Trattnig <david.trattnig@o94.at>
Date: Fri, 18 Dec 2020 15:45:19 +0100
Subject: [PATCH] Info on normalization.
---
README.md | 1 +
docs/engine-features.md | 8 ++++++++
2 files changed, 9 insertions(+)
diff --git a/README.md b/README.md
index 4f25b70d..fab6db6a 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ the requirements of community radios.
- **Multichannel Line-out**
- **Silence Detector** to avoid *Dead Air*
- **Auto DJ** which plays random music when silence is detected
+- **ReplayGain** normalization done using passed [ReplayGain](https://en.wikipedia.org/wiki/ReplayGain) meta data
- **API** to query Track-Service, monthly reports and information for displaying the Studio Clock (see [Engine API](https://gitlab.servus.at/aura/engine-api))
- **Web Application for a Track Service** (see [AURA Player](https://gitlab.servus.at/aura/player))
- **Web Application providing a Studio Clock** (see [Engine Clock](https://gitlab.servus.at/aura/engine-clock))
diff --git a/docs/engine-features.md b/docs/engine-features.md
index 6fd8dd81..274d7599 100644
--- a/docs/engine-features.md
+++ b/docs/engine-features.md
@@ -13,6 +13,7 @@ This page gives a more detailed overview of the Aura Engine features and how to
- [Default Playlists](#default-playlists)
- [Auto DJ](#auto-dj)
- [Silence Detector](#silence-detector)
+ - [ReplayGain and LoudNorm Normalization](#replaygain-and-loudnorm-normalization)
- [Monitoring](#monitoring)
- [Send mails on errors and warnings](#send-mails-on-errors-and-warnings)
- [Engine Health Information via Engine API](#engine-health-information-via-engine-api)
@@ -182,6 +183,13 @@ channel.
> Note, all these fallback source are fully integrated with the Engine's playlog and track-service
feature including indications from which fallback level some audio is broadcasted.
+## ReplayGain and LoudNorm Normalization
+
+If the played media files contain [ReplayGain](https://en.wikipedia.org/wiki/ReplayGain) meta information,
+then such audio is automatically normalized accordingly. Note, if you are using Engine in conjunction with
+[AURA Tank](https://gitlab.servus.at/aura/tank) then also a [LoudNorm](http://k.ylo.ph/2016/04/04/loudnorm.html)
+normalization step is applied. In that case files are re-encoded by Tank itself.
+
## Monitoring
You have following options to monitor the Engine:
--
GitLab