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Clementine music player and sandisk6/26/2023 ![]() FLAC and Ogg Vorbis use the REPLAYGAIN_* Vorbis comment fields. Most implementations now use tags for ReplayGain information. ![]() The original ReplayGain proposal specified an 8- byte field in the header of any file. The peak level metadata can be used to prevent gain adjustments from inducing clipping in the playback device. ReplayGain-capable audio players use the replay gain metadata to automatically attenuate or amplify the signal on a per-track or per-album basis such that tracks or albums play at a similar loudness level. Typically, the replay gain and peak level values are then stored as metadata in the audio file. ![]() The difference between the measured perceived loudness and the desired target loudness is calculated this is considered the ideal replay gain value. Equal-loudness contours are used to compensate for frequency effects and statistical analysis is used to accommodate for effects related to time. ReplayGain works by first performing a psychoacoustic analysis of an entire audio track or album to measure peak level and perceived loudness.
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