Audio signal processor selectively deriving harmony part from polyphonic parts
AssigneeYamaha Corporation
InventorYasuo Kageyama
Life of this patent
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Abstract
In an audio signal processor, an input device inputs a polyphonic audio signal containing a plurality of melodic parts which constitute a music composition. A detecting device detects a particular one of the melodic parts contained in the input polyphonic audio signal. An extracting device extracts the detected melodic part from the input polyphonic audio signal. A harmony generating device shifts a pitch of the extracted melodic part to generate a harmony audio signal representative of an additional harmony part. An output device mixes the generated harmony audio signal to the input polyphonic audio signal so as to sound the music composition which contains the additional harmony part derived from the particular one of the melodic parts.
Claims17
An audio signal processor comprising:
- an input device that inputs a polyphonic audio signal containing a plurality of melodic parts which constitute a music composition;
- a detecting device that selects a predetermined one of the plurality of the melodic parts contained in the input polyphonic audio signal;
- an extracting device that extracts the selected melodic part from the input polyphonic audio signal;
- a harmony generating device that shifts a pitch of the extracted melodic part to generate a harmony audio signal representative of an additional harmony part;
- and
- an output device that mixes the generated harmony audio signal to the input polyphonic audio signal so as to sound the music composition which contains the additional harmony part derived from the predetermined one of the melodic parts.
A harmony creating method comprising the steps of:
- inputting a polyphonic audio signal containing a plurality of melodic parts which constitute a music composition;
- selecting a predetermined one of the plurality of the melodic parts contained in the input polyphonic audio signal;
- extracting the selected melodic part from the input polyphonic audio signal;
- shifting a pitch of the extracted melodic part to generate a harmony audio signal representative of an additional harmony part;
- and
- mixing the generated harmony audio signal to the input polyphonic audio signal so as to sound the music composition which contains the additional harmony part derived from the predetermined one of the melodic parts.
An audio signal processor comprising:
- a plurality of input devices that input a plurality of audio signals representative of a plurality of melodic parts which constitute a music composition;
- a selecting device that selects a specified melodic part from the plurality of the melodic parts and generates a selection signal corresponding to the specified melodic part;
- a switching device coupled to the plurality of input devices that selects in response to the selection signal one of the audio signals representative of the selected melodic part;
- a harmony generating device that shifts a pitch of the selected melodic part to generate a harmony audio signal representative of an additional harmony part;
- and
- an output device that mixes the harmony audio signal and the plurality of audio signals to sound the music composition which contains the additional harmony part derived from the selected one of the melodic parts.
Dependencies are inferred from the claim text.