Patent ID: 9711121
Date: 2017-07-18
CPC Classifications: A63F,G10H

Claim:
1. A method for note recognition of an audio source in an application having a set of pitches to be played by a user, said method comprising the steps of: dividing an audio input into a plurality of frames, each frame having a pre-determined length, conducting a frequency analysis of at least a set of the plurality of frames, based on the frequency analysis, determining if a frame is a transient frame with a frequency change between the beginning and end of the frame, for each transient frame, outputting pitch data of a pitch to be played by a user at the time of the transient frame, conducting frequency analysis of at least one non-transient frame following the transient frame, based on the frequency analysis determining a pitch of the frame, checking if the determined pitch of said following frame is the same as the output pitch to be played and if not, outputting the determined pitch data for the following frame.