Various methods for representing audio suitable for use in variational audio encoding are disclosed. A method comprises maintaining, by a computing system, state information for multiple resonator models with different resonant frequencies. The method further comprises iteratively performing a number of different operations, by the computing system for multiple respective samples in a set of audio samples in the time domain. These operations include updating the state information for the multiple resonator models based on the sample amplitude. The operations also include determining respective resonator amplitudes and phases for the updated multiple resonator models and storing, respective resonator amplitude and change-in-phase information for the sample.

A digital-to-analog converter performs a computation process to start the computation based upon the second clock signal with respect to the digital data of music sound if the computation is not under execution when the control signal is outputted by the signal output process, a control process to inhibit the computation based upon the second clock signal from being started with respect to the digital data of music sound until the computation is not under execution when the computation is under execution, and an output process to convert a computation result of the computation process into an analog signal and output the analog signal.

A digital-to-analog converter performs a computation process to start the computation based upon the second clock signal with respect to the digital data of music sound if the computation is not under execution when the control signal is outputted by the signal output process, a control process to inhibit the computation based upon the second clock signal from being started with respect to the digital data of music sound until the computation is not under execution when the computation is under execution, and an output process to convert a computation result of the computation process into an analog signal and output the analog signal.