In an example context of identifying live audio, an audio processor machine accesses audio data that represents a query sound and creates a spectrogram from the audio data. Each segment of the spectrogram represents a different time slice in the query sound. For each time slice, the audio processor machine determines one or more dominant frequencies and an aggregate energy value that represents a combination of all the energy for that dominant frequency and its harmonics. The machine creates a harmonogram by representing these aggregate energy values at these dominant frequencies in each time slice. The harmonogram thus may represent the strongest harmonic components within the query sound. The machine can identify the query sound by comparing its harmonogram to other harmonograms of other sounds and may respond to a user's submission of the query sound by providing an identifier of the query sound to the user.

An effects device for a musical instrument, comprising: an input (18) for receiving a signal from a musical instrument; a control input (7) for receiving a control signal; an output (8, 9) for connecting the device to a sound reproduction device; a memory (30) configured to record the input signal; and a processor (29) configured, upon receiving a control signal, to select a section of the recorded input signal from the memory (30) and to loop it, wherein the processor (29) is configured to overlap a start and end regions of the selected section when looping. A method is also provided for producing an effect for a musical instrument, comprising the steps: a) recording an input signal from a musical instrument into memory (30), b) selecting a section of the recorded input signal and looping it, wherein a start and end regions of the selected segment are overlapping when looping.

System, process and device configurations are provided for customized audio spectrum generation of gaming music. A method includes detecting at least one audio spectrum input for gaming music and updating a parameter for dynamic music generation based on the at least one audio spectrum input. The method also includes generating gaming music for the gaming system dynamically to include at least one musical motif determined based on the parameter, and output of gaming music. Frequency or tonalities of dynamic generated music that interfere with gameplay sound effects may be adjusted to improve gameplay. In some cases volume of sound elements may be shifted in volume or pitch to indicate presence of gaming elements or opportunities during gameplay. Similarly, frequency ranges may be customized to avoid one or more frequencies, such as a frequency range identified as being associated with hearing loss or with causing a disturbance, such as vibration.

An electronic measuring device captures a plurality of audio samples, wherein each audio sample corresponds to a different string of a musical instrument. The device further identifies a plurality of frequency components of each of the plurality of audio samples, calculates an optimal tuning curve based on the plurality of frequency components of each of the plurality of audio samples, and determines a deviation of the plurality of frequency components of each of the plurality of audio samples from the optimal tuning curve.

A sound processing device includes: a combining processor that combines a performance sound and a source sound, based on operation information corresponding to a performance operation on an instrument. The performance sound is obtained by picking up a sound generated by the performance operation on the instrument. The source sound is obtained from a sound source.

An effects device for a musical instrument, comprising: an input (18) for receiving a signal from a musical instrument; a control input (7) for receiving a control signal; an output (8, 9) for connecting the device to a sound reproduction device; a memory (30) configured to record the input signal; and a processor (29) configured, upon receiving a control signal, to select a section of the recorded input signal from the memory (30) and to loop it, wherein the processor (29) is configured to overlap a start and end regions of the selected section when looping. A method is also provided for producing an effect for a musical instrument, comprising the steps: a) recording an input signal from a musical instrument into memory (30), b) selecting a section of the recorded input signal and looping it, wherein a start and end regions of the selected segment are overlapping when looping.

In an example context of identifying live audio, an audio processor machine accesses audio data that represents a query sound and creates a spectrogram from the audio data. Each segment of the spectrogram represents a different time slice in the query sound. For each time slice, the audio processor machine determines one or more dominant frequencies and an aggregate energy value that represents a combination of all the energy for that dominant frequency and its harmonics. The machine creates a harmonogram by representing these aggregate energy values at these dominant frequencies in each time slice. The harmonogram thus may represent the strongest harmonic components within the query sound. The machine can identify the query sound by comparing its harmonogram to other harmonograms of other sounds and may respond to a user's submission of the query sound by providing an identifier of the query sound to the user.

In an example context of identifying live audio, an audio processor machine accesses audio data that represents a query sound and creates a spectrogram from the audio data. Each segment of the spectrogram represents a different time slice in the query sound. For each time slice, the audio processor machine determines one or more dominant frequencies and an aggregate energy value that represents a combination of all the energy for that dominant frequency and its harmonics. The machine creates a harmonogram by representing these aggregate energy values at these dominant frequencies in each time slice. The harmonogram thus may represent the strongest harmonic components within the query sound. The machine can identify the query sound by comparing its harmonogram to other harmonograms of other sounds and may respond to a user's submission of the query sound by providing an identifier of the query sound to the user.

The invention concerns a method for generating a signature of a musical audio signal of a given duration, the method comprising the following steps: modelling (104) the musical audio signal to obtain, for each frequency band of a set of n frequency bands, a diagram representing the energy of the audio signal for the frequency band, on the basis of the time during said given duration; determining (103) musical transition times t.sub.k of the audio signal during the given duration; associating (105) each musical transition time tk with an item of local information comprising a vector of n values representative, respectively, of the energy of the audio signal in each of the n diagrams obtained between musical transition time tk and a subsequent musical transition time tk+1 and/or a vector of n values representative, respectively, of the energy of the audio signal in each of the n diagrams obtained between musical transition time tk and a preceding musical transition time tk1; determining (106), on the basis of the local information associated with each musical transition time tk, a key associated with the musical transition time, the determined keys forming a first set of keys of the audio signal; generating (107) a signature of the musical audio signal comprising pairs of keys from the first set of keys and associated musical transition times tk.

An apparatus for analysing a magnitude spectrogram of an audio signal is provided. The apparatus includes a frequency change determiner being configured to determine a change of a frequency for each time-frequency bin of a plurality of time-frequency bins of the magnitude spectrogram of the audio signal depending on the magnitude spectrogram of the audio signal. Moreover, the apparatus includes a classifier being configured to assign each time-frequency bin of the plurality of time-frequency bins to a signal component group of two or more signal component groups depending on the change of the frequency determined for the time-frequency bin.