Systems and methods for synchronization of audio streams

A wireless audio synchronization system comprising:

• a transmitter configured to generate a stream of audio packets, each packet comprising a presentation timestamp associated with a wall clock of the transmitter;
• a plurality of receiver units each comprising:
• a timestamp processor configured to estimate a local TSF time;
• a delay estimator configured to determine a playback delay from a difference between the presentation timestamp and the local TSF time;
• a resampler configured to resample the received audio stream to a local playback rate based on the playback delay;
• and
• a presentation time phase detector configured to adjust the playback clock to reduce phase error between the receiver units, wherein the system is configured to maintain channel-to-channel latency of less than one microsecond across the plurality of receiver units.

A device for synchronization of wireless streams, comprising:

• one or more processors configured to execute instructions;
• a memory storing the instructions, wherein the instructions are executed by the process to:
• receive an input timing datum representing a reference time derived from a wireless synchronization protocol;
• determine a timing offset relative to a local device counter;
• configure an adjustable filter by setting at least one coefficient based on the determined timing offset;
• apply the adjustable filter to generate an output timing datum corresponding to a filtered wall time;
• update an audio presentation schedule using the output timing datum;
• and
• adjust playback timing of one or more audio channels based on the updated audio presentation schedule to maintain synchronized audio playback across multiple devices.