Electronic device and system for synchronizing playback time of sound source

An electronic device, comprising:

• a hardware timer configured to operate at a first resolution;
• a memory configured to store a sound source and an instruction to play back the sound source;
• a sensor configured to sense a playback event;
• a communication circuit configured to transmit a signal indicating the playback event occurred to a slave electronic device paired with the electronic device when the playback event occurs;
• and
• a processor configured to execute an operating system (OS) which operates at a second resolution,
• wherein the processor is further configured to:
• measure a first time point based on the first resolution of the hardware timer after the communication circuit transmits the signal;
• calculate a second time point adding a first time interval to the first time point;
• and
• execute the instruction to play back the sound source at the second time point, and
• wherein the first resolution of the hardware timer is higher than the second resolution of the OS.

A system for synchronizing a playback time, the system comprising:

• a slave electronic device configured to store a sound source and an instruction to play back the sound source;
• and
• a master electronic device configured to store the sound source and the instruction to play back the sound source and transmit a signal indicating that a playback event occurred to the slave electronic device in response to the playback event occurring,
• wherein the slave electronic device is configured to:
• measure a first time point in response to the signal received from the master electronic device;
• calculate a second time point adding a predefined first time interval to the first time point;
• and
• execute the instruction to play back the sound source at the second time point, and
• wherein the master electronic device is configured to:
• measure a third time point after transmitting the signal indicating the playback event occurred to the slave electronic device;
• calculate a fourth time point adding a second time interval to the third time point;
• and
• execute the instruction to play back the sound source at the fourth time point.