A media server facilitates automatic audio level adjustment during playback of a media item by a media player application running on a computing device. A media server provides media items to clients via a network. A media player application on a client presents media items to a user of the client. The media player application may also collect playback data and send the data to the media server. Playback data may include audio levels for two media items presented sequentially. The media server determines audio level adjustment instructions based on playback data received from one or more media player applications and provides the instructions to cause automatic audio level adjustments to facilitate the presentation of media items at more appropriate sound strengths.