An electronic device comprising: at least one speaker and a processor , wherein the processor is configured to: obtain sound source data ; identify a processing capability of the processor ; determine a first designated frequency band based on the processing capability of the processor , wherein the first designated frequency band is determined to be a first range of frequencies if the processing capability is a first processing capability, and determined to be a second range of frequencies broader than the first range if the processing capability is lower than the first processing capability; obtain first sound source data corresponding to the first designated frequency band from the sound source data by using a high-pass filter; generate second sound source data by down-sampling the sound source data , wherein the second sound source data corresponds to a frequency band of the sound source data other than the first designated frequency band; generate third sound source data by applying a sound effect to the second sound source data generated by down-sampling the sound source data ; and generate synthesized sound source data based on the first sound source data and the third sound source data . at least one speaker and a processor , wherein the processor is configured to: obtain sound source data ; identify a processing capability of the processor ; determine a first designated frequency band based on the processing capability of the processor , wherein the first designated frequency band is determined to be a first range of frequencies if the processing capability is a first processing capability, and determined to be a second range of frequencies broader than the first range if the processing capability is lower than the first processing capability; obtain first sound source data corresponding to the first designated frequency band from the sound source data by using a high-pass filter; generate second sound source data by down-sampling the sound source data , wherein the second sound source data corresponds to a frequency band of the sound source data other than the first designated frequency band; generate third sound source data by applying a sound effect to the second sound source data generated by down-sampling the sound source data ; and generate synthesized sound source data based on the first sound source data and the third sound source data . obtain sound source data ; identify a processing capability of the processor ; determine a first designated frequency band based on the processing capability of the processor , wherein the first designated frequency band is determined to be a first range of frequencies if the processing capability is a first processing capability, and determined to be a second range of frequencies broader than the first range if the processing capability is lower than the first processing capability; obtain first sound source data corresponding to the first designated frequency band from the sound source data by using a high-pass filter; generate second sound source data by down-sampling the sound source data , wherein the second sound source data corresponds to a frequency band of the sound source data other than the first designated frequency band; generate third sound source data by applying a sound effect to the second sound source data generated by down-sampling the sound source data ; and generate synthesized sound source data based on the first sound source data and the third sound source data . <EOS>