Polyphonic tuner
AssigneeThe TC Group A/S
InventorsSøren Henningsen Nielsen, Esben Skovenborg, Lars Arknæs-Pedersen, Kim Rishøj Pedersen
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Abstract
A musical instrument tuner for string instruments is provided which comprises a signal classifier for determining a signal class of an input signal from a number of monophonic signal classes and a number of polyphonic signal classes, a signal analyzer for determining at least one representation of a pitch frequency of the input signal, and an indicator for displaying an output established on the basis of the signal class and the representation of a pitch frequency.
Claims23
A musical instrument tuner comprising
- a signal classifier arranged to determine, based on an input signal, a signal class of said input signal from a predetermined group of classes at least comprising polyphonic chord classes;
- a signal analyzer arranged to determine at least one characteristic of said input signal, wherein said characteristic comprises representations of several pitch frequencies or deviations of several pitch frequencies from several target pitch frequencies, and wherein said signal analyser is arranged to determine said pitch frequencies with a resolution better than a half semitone, and
- an indicator arranged to display an output established on the basis of said signal class and said at least one characteristic, wherein said indicator is arranged to enable at least one display mode comprising representations of several pitch frequencies or deviations of several pitch frequencies from several target pitch frequencies.
A tuning measurement method for tuning a musical string instrument comprising the steps of:
- receiving an audio signal generated by said musical string instrument;
- determining, based on said audio signal, a signal class of said audio signal from a group of signal classes at least comprising polyphonic chord classes;
- determining representations of several pitch frequencies or deviations of several pitch frequencies from several target pitch frequencies, wherein said pitch frequencies are determined with a resolution better than a half semitone;
- and
- displaying an output established on the basis of said signal class and said at least one representations of several pitch representations of several pitch frequencies or deviations of several pitch frequencies from several target pitch frequencies, wherein said pitch frequencies are determined with a resolution better than a half semitone, wherein said output is displayed according to a display mode where several deviation representations are displayed, each deviation representation being a representation of a deviation from a target frequency defined by said determined chord class.
A computer program product comprising a computer readable medium having control logic stored therein for causing a computer to determine and display a characteristic of a musical string instrument, the control logic comprising:
- first computer readable program code means for causing the computer to receive an audio signal from said musical string instrument;
- second computer readable program code means for causing the computer to determine, based on said audio signal, a signal class of said audio signal from a predetermined group of signal classes at least comprising polyphonic chord classes;
- third computer readable program code means for causing the computer to determine representations of several pitch frequencies or deviations of several pitch frequencies from several target pitch frequencies, wherein said pitch frequencies are determined with a resolution better than a half semitone;
- and
- fourth computer readable program code means for causing the computer to display a characteristic of said musical instrument established on the basis of said signal class and said representations of several pitch frequencies or deviations of several pitch frequencies from several target pitch frequencies in accordance with a display mode where several deviation representations are displayed, each deviation representation being a representation of a deviation from a target frequency defined by said determined chord class.
Dependencies are inferred from the claim text.