ReplayGain

The replay gain data of a song.
{
    "trackGain": 0.1,
    "albumGain": 1.1,
    "trackPeak": 9.2,
    "albumPeak": 0,
    "baseGain": 0,
    "fallbackGain": -8.1
}
Does not exist.
FieldTypeReq.OpenS.Details
trackGainnumberNoYesThe track replay gain value. (In Db)
albumGainnumberNoYesThe album replay gain value. (In Db)
trackPeaknumberNoYesThe track peak value. (Must be positive)
albumPeaknumberNoYesThe album peak value. (Must be positive)
baseGainnumberNoYesThe base gain value. (In Db) (Ogg Opus Output Gain for example)
fallbackGainnumberNoYesAn optional fallback gain that clients should apply when the corresponding gain value is missing. (Can be computed from the tracks or exposed as an user setting.)

Note: If the data is not present the field must be ommited in the answer. (But the replayGain field on Child must always be present)