Provided is a device for reporting a tuning status by sound on the basis of an audio signal acquired. The device includes: a signal acquisition means for acquiring the audio signal; a comparison means for comparing the frequency of the audio signal with a reference frequency corresponding to the audio signal; and a generation means for generating a first sound signal when the frequency of the audio signal is lower than the reference frequency and generating a second sound signal different from the first sound signal when the frequency of the audio signal is higher than the reference frequency.

Provided is a device for reporting a tuning status by sound on the basis of an audio signal acquired. The device includes: a signal acquisition means for acquiring the audio signal; a comparison means for comparing the frequency of the audio signal with a reference frequency corresponding to the audio signal; and a generation means for generating a first sound signal when the frequency of the audio signal is lower than the reference frequency and generating a second sound signal different from the first sound signal when the frequency of the audio signal is higher than the reference frequency.

A stringed instrument tuner that senses the vibration of all the strings of the instrument independently and simultaneously via ultraviolet reflective light sensors that are immune to interference from ambient alternating-current lighting. The pitches of the strings are then measured continuously in real-time and transmitted wirelessly to a receiver that simultaneously graphically displays how far out-of-tune all of the strings are so that the musician can instantly see which strings need tuning and tune them quickly. The receiver may be a smartphone, smartwatch, smart glasses, computer, self-tuning system, or a dedicated wearable receiver-display unit.

A stringed instrument tuner that senses the vibration of all the strings of the instrument independently and simultaneously via ultraviolet reflective light sensors that are immune to interference from ambient alternating-current lighting. The pitches of the strings are then measured continuously in real-time and transmitted wirelessly to a receiver that simultaneously graphically displays how far out-of-tune all of the strings are so that the musician can instantly see which strings need tuning and tune them quickly. The receiver may be a smartphone, smartwatch, smart glasses, computer, self-tuning system, or a dedicated wearable receiver-display unit.

An audio signal analysis system comprises an electronic controller that is configured to execute a plurality of modules including an acquisition module configured to acquire a first spectrum, which is a time average of a plurality of frequency spectra of an audio signal, a specification module configured to acquire a plurality of reference values corresponding to different pitches that follow a prescribed temperament and configured to specify, by a problem-solving search algorithm, a frequency difference corresponding to a second spectrum which includes a plurality of components each having a frequency difference with respect to each of the plurality of reference values, the second spectrum being similar to the first spectrum with a degree of similarity exceeding a prescribed threshold value, and a correction module configured to correct the frequency difference so as to reduce systematic error included in the frequency difference specified by the specification module.

A fine tuner for a string musical instrument, comprising a main body having an underside, a top side, a first abutment region and having a second abutment region for a string, wherein the second abutment region is spaced apart from the first abutment region, a gripping element for gripping a string portion that is located between the first abutment region and the second abutment region, and an adjusting device, which sits on the main body and acts on the gripping element, wherein a position of the gripping element relative to the main body is adjustable in a fixable manner using the adjusting device and the position of the gripping element determines a deflected position of the string at the fine tuner, and wherein the gripping element entrains the string portion counter to a direction that extends in a direction from the top side to the underside.

A frequency detection and display device includes a body having a vibratory portion configured for vibrating at a predetermined frequency. In this manner, the vibratory portion provides a visible indication corresponding to the predetermined frequency in response to vibration of an object, such as a stringed musical instrument, to which the frequency detection and display device is attached.

A frequency detection and display device includes a body having a vibratory portion configured for vibrating at a predetermined frequency. In this manner, the vibratory portion provides a visible indication corresponding to the predetermined frequency in response to vibration of an object, such as a stringed musical instrument, to which the frequency detection and display device is attached.

A method of manufacturing a vibrator device includes preparing a vibrator element including a vibrating arm and a weight provided to the vibrating arm, and irradiating the weight with a laser beam to remove apart of the weight. Further, in the step of irradiating the weight with the laser beam to remove the part of the weight, the part of the weight is irradiated with the laser beam to thereby provide the weight with a removed area where the part of the weight is removed, and an unremoved area where the weight is not removed, and in an area close to the unremoved area in the removed area, an amount of irradiation with the laser beam is gradually increased in a direction from the unremoved area side toward the removed area.

An electronic device comprising: a vibration sensor arranged to detect and measure a vibration emitted from a vibration source; and a housing arranged to house the vibration sensor; wherein the housing includes an engagement mechanism to engage the housing to a portable cradle.