Musical performance correction method and musical performance correction device

A musical performance correction device comprising:

• a memory storing instructions;
• and
• a processor that implements the instructions to:
• acquire from a MIDI instrument, musical performance data indicated by a played pitch played by a user;
• estimate a playing position in a musical composition by analyzing the musical performance data, wherein:
• the playing position is estimated, for each of a plurality of combinations of a first pitch and a second pitch, using probability of the second pitch being erroneously played in place of the first pitch;
• correct the played pitch indicated by the musical performance data to a reference pitch, from among a plurality of reference pitches corresponding to the playing position in the musical composition, in a case where a difference between the played pitch and the reference pitch is less than a predetermined value;
• generate a sound signal, corresponding to the musical performance data, including a reference pitch, in a state where the played pitch has been corrected to the reference pitch;
• and
• perform, via a DA converter, digital-to-analog conversion of the generated sound signal and output the converted sound signal to a sound emission device that emits the converted sound signal to sound.

A non-transitory computer readable medium storing a musical performance correction program executable by a computer to execute a method comprising:

• acquiring from a MIDI instrument, musical performance data indicating a played pitch played by a user;
• estimating a playing position in a musical composition by analyzing the musical performance data, wherein:
• the playing position is estimated, for each of a plurality of combinations of a first pitch and a second pitch, using probability of the second pitch being erroneously played in place of the first pitch;
• correcting the played pitch indicated by the musical performance data to a reference pitch, from among a plurality of reference pitches corresponding to the playing position in the musical composition, in a case where a difference between the played pitch and the reference pitch is less than a predetermined value;
• generating a sound signal, corresponding to the musical performance data, including a reference pitch, in a state where the played pitch has been corrected to the reference pitch;
• and
• performing, via a DA converter, digital-to-analog conversion of the generated sound signal and outputting the converted sound signal to a sound emission device that emits the converted sound signal to sound.