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Playback device synchrony group states

  • US 10,324,684 B2
  • Filed: 05/07/2018
  • Issued: 06/18/2019
  • Est. Priority Date: 07/28/2003
  • Status: Expired due to Term
First Claim
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1. In a media playback network comprising an audio information source, a first zone player, and a second zone player, a method comprising:

  • the audio information source transmitting media content for playback by a synchrony group comprising the first zone player and the second zone player, wherein the first zone player is a master of the synchrony group and the second zone player is a slave in the synchrony group;

    the first zone player (i) receiving the media content via a data network, (ii) transmitting the media content via the data network to the second zone player, and (iii) playing the media content; and

    the second zone player (i) receiving the media content from the first zone player, (ii) determining a timing difference between a clock of the second zone player and a clock of the first zone player, (iii) receiving playback timing comprising at least one future playback time for at least one portion of the media content at which the first zone player and the second zone player are to play the at least one portion of the media content and (iv) using the at least one future playback time to play the media content in synchrony with the first zone player based on the timing difference between the clock of the second zone player and the clock of the first zone player.

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