Information processing method, estimation model construction method, information processing device, and estimation model constructing device

A sound synthesizing device for synthesizing an audio signal from music data, the sound synthesizing device comprising:

• a memory storing instructions;
• and
• a processor configured to implement the stored instructions to:
• generate a first model, which is a first neural network, trained using first training data to estimate a series of fluctuations for each unit period;
• generate a second model, which is a second neural network, trained using second training data to estimate a series of features for each unit period;
• obtain from the music data:
• a first series of control data of a target sound to be synthesized;
• and
• a second series of control data of the target sound to be synthesized;
• generate a series of fluctuations, which is a dynamic component that fluctuates with time, of the target sound based on the first series of control data of the target sound to be synthesized obtained from the music data with the first model;
• and
• generate a series of features, which indicate a series of at least one of pitches, amplitudes, or tones, of the target sound based on second series of control data of the target sound obtained from the music data and the generated series of fluctuations of the target sound with the second model;
• and
• generate the audio signal representing a waveform of the target sound based on the generated series of features.