ReplayGain

Introduction

ReplayGain is the name of a technique invented to achieve the same perceived playback loudness of audio files. It defines an algorithm to measure the perceived loudness of audio data.

ReplayGain allows the loudness of each song within a collection of songs to be consistent. This is called 'Track Gain'. It also allows the loudness of a specific sub-collection (an "album") to be consistent with the rest of the collection, while allowing the dynamics from song to song on the album to remain intact. This is called 'Album Gain'. This is especially important when listening to classical music albums, because quiet tracks need to remain a certain degree quieter than the louder ones.

Omnia supports both track gain and album gain, and even can work smarter to choose the mode automatically.

Prerequisites

Omnia currently supports mp3 replay gain. The gain information needs to be stored in each mp3 file, with tag REPLAYGAIN_TRACK_GAIN and/or REPLAYGAIN_ALBUM_GAIN.

ReplayGain Mode

Currently, Omnia supports 3 different ReplayGain modes: auto, album and track.

Track gain is preferred in track mode, and album gain is preferred in album mode. When auto mode is selected, if songs in playing queue are from the same album, album gain is preferred, otherwise, track gain is preferred.

Preamp and Default

You can define preamp for the music files with gain information. The preamp value will be considered together with the gain value. You can also define replay gain default value for the music files who do not contain gain information. Please change them in settings page if necessary.

ReplayGain dynamic analysis

If your music files does not contain replay gain tags, but you still want to achieve similar features, you can enable ReplayGain dynamic analysis in settings.

The settings has three different levels, soft, medium and hard. Soft is the default behavior.

Please be noticed that the dynamic analysis sometimes is not accurate.