An improved analysis and determination of a relationship between a tone frequency and spurious frequencies is provided. A device under test is operated to generate signals based on multiple different tone frequencies. For each tone frequency a spectrum of the generated signal is measured and spurious frequencies in the generated signal are identified. Based on the measured spectrums a representation of the spurious frequencies versus the related tone frequencies is generated. Trajectories may be inserted into the representation for indicating relationships between the tone frequencies and the spurious frequencies. This representation provides a useful basis for a fast and reliable identification of relationships between spurious frequencies and tone frequencies.

An improved analysis and determination of a relationship between a tone frequency and spurious frequencies is provided. A device under test is operated to generate signals based on multiple different tone frequencies. For each tone frequency a spectrum of the generated signal is measured and spurious frequencies in the generated signal are identified. Based on the measured spectrums a representation of the spurious frequencies versus the related tone frequencies is generated. Trajectories may be inserted into the representation for indicating relationships between the tone frequencies and the spurious frequencies. This representation provides a useful basis for a fast and reliable identification of relationships between spurious frequencies and tone frequencies.

A method for synchronizing an electronic interactive device on basis of a first sound track is provided. The method may include identifying a first peak point and a valley point of the first sound track by calculating a first energy of the first peak point and a first energy of the valley point of the first peak point and comparing the first energy of the first peak point with first energy of neighboring points of the first peak point. The method may also include identifying a first peak point of a second soundtrack, and determining a similarity between the first soundtrack and a second sound track on basis of the first peak point of the first soundtrack and the first peak point of the second sound track.

A method for synchronizing an electronic interactive device on basis of a first sound track is provided. The method may include identifying a first peak point and a valley point of the first sound track by calculating a first energy of the first peak point and a first energy of the valley point of the first peak point and comparing the first energy of the first peak point with first energy of neighboring points of the first peak point. The method may also include identifying a first peak point of a second soundtrack, and determining a similarity between the first soundtrack and a second sound track on basis of the first peak point of the first soundtrack and the first peak point of the second sound track.

A voice processing method realized by a computer includes compressing forward a first steady period of a plurality of steady periods in a voice signal representing voice, and extending forward a transition period between the first steady period and a second steady period of the plurality of steady periods in the voice signal. Each of the plurality of steady periods is a period in which acoustic characteristics are temporally stable. The second steady period is a period immediately after the first steady period and has a pitch that is different from a pitch of the first steady period.

A sound output system according to an embodiment includes a speaker configured to output a sound according to sound data supplied to the speaker, and an operation device comprising one or more operators, a drive unit configured to drive the one or more operators based on performance data supplied to the operation device in synchronization with the sound data supplied to the speaker, and a drive control unit configured to control the drive unit. According to the output system, it is possible to faithfully reproduce a performance sound at the time of performance and to accurately reproduce a performance at the time of performance by driving at operator based on the performance sound.

A sound output system according to an embodiment includes a speaker configured to output a sound according to sound data supplied to the speaker, and an operation device comprising one or more operators, a drive unit configured to drive the one or more operators based on performance data supplied to the operation device in synchronization with the sound data supplied to the speaker, and a drive control unit configured to control the drive unit. According to the output system, it is possible to faithfully reproduce a performance sound at the time of performance and to accurately reproduce a performance at the time of performance by driving at operator based on the performance sound.

The inventions relate to the field of electric musical instruments, more particularly, to an optical sensor for a stringed musical instrument with a digital interface and to a stringed musical instrument with a digital interface equipped with said sensor (MIDIMusical Instrument Digital Interface). Implementation of the disclosed inventions allows to obtain a signal corresponding to vibrations (deflections) of a string in two mutually perpendicular planes, with the influence of the device generating such signals on string vibration parameters being reduced, without signals generated by different strings being mixed and with dimensions of the optical sensor being reduced to allow for its compact placement on a stringed musical instrument.

At least one electronic signal is converted into at least one electromagnetic field, where the electronic signal may be created or modulated by environmental, interactive, and programmed inputs. The at least one electromagnetic field vibrates a ferromagnetic element creating an acoustic sound and optionally a transducer converts the vibration into an electronic signal for processing.

At least one electronic signal is converted into at least one electromagnetic field, where the electronic signal may be created or modulated by environmental, interactive, and programmed inputs. The at least one electromagnetic field vibrates a ferromagnetic element creating an acoustic sound and optionally a transducer converts the vibration into an electronic signal for processing.