Patent ID: 9648422
Date: 2017-05-09
CPC Classifications: G06F,H03G,H04R,H04S

Claim:
1. A non-transitory computer-readable medium having stored therein instructions executable by one or more processors to cause a device to perform operations comprising: detecting a trigger condition that initiates calibration of a plurality of playback devices, wherein calibrating the plurality of playback devices comprises a given number of playback devices respectively emitting a calibration sound according to a sequence; sending, to a first playback device of the plurality of playback devices, a command that instructs the first playback device to repeatedly emit the calibration sound according to the sequence, wherein the calibration sound cycles through frequencies of a calibration frequency range, and wherein a duration of the calibration sound is proportional to the given number of playback devices in the plurality of playback devices; sending, to one or more additional playback devices of the plurality of playback devices, respective commands that instruct the one or more additional playback devices to repeatedly emit the respective calibration sound according to the sequence, wherein the commands instruct the one or more additional playback devices to stagger emission of the calibration sounds such that each emitted calibration sound is delayed relative to a preceding calibration sound in the sequence; and detecting, via a microphone, the emitted calibration sounds.