A method of tracking record player stylus elapsed play time for quality and maintenance utilizes stylus playtime chronograph. The stylus playtime chronograph includes an internal memory that stores elapsed time of an associated stylus, wherein memory of the elapsed time will be maintained on the chronograph even if power supply is interrupted; a display that will display hour truncated elapsed time of an associated stylus; a start button to start and restart the recording of elapsed time of an associated stylus; a stop button to stop or pause the recording of elapsed time of an associated stylus; and a reset button to allow for resetting of the chronograph and allow the chronograph to be used for the another stylus.

A method of tracking record player stylus elapsed play time for quality and maintenance utilizes stylus playtime chronograph. The stylus playtime chronograph includes an internal memory that stores elapsed time of an associated stylus, wherein memory of the elapsed time will be maintained on the chronograph even if power supply is interrupted; a display that will display hour truncated elapsed time of an associated stylus; a start button to start and restart the recording of elapsed time of an associated stylus; a stop button to stop or pause the recording of elapsed time of an associated stylus; and a reset button to allow for resetting of the chronograph and allow the chronograph to be used for the another stylus.

The present invention relates to a record player with a cabinet, a speaker, a movement base-plate, and a movement, wherein the cabinet contains a first opening and a second opening, the first opening being positioned on a side surface, a bottom surface or a top surface of the cabinet, and the second opening being positioned on the top surface of the cabinet; the speaker is positioned at the first opening and is electrically connected to the movement; and the movement base-plate is positioned at the second opening and includes a recessed part in which the movement is placed. The record player of the present invention includes a built-in speaker and a good resonance chamber formed therein, therefore the sound quality played by the record player can be effectively improved.

The present invention relates to a record player with a cabinet, a speaker, a movement base-plate, and a movement, wherein the cabinet contains a first opening and a second opening, the first opening being positioned on a side surface, a bottom surface or a top surface of the cabinet, and the second opening being positioned on the top surface of the cabinet; the speaker is positioned at the first opening and is electrically connected to the movement; and the movement base-plate is positioned at the second opening and includes a recessed part in which the movement is placed. The record player of the present invention includes a built-in speaker and a good resonance chamber formed therein, therefore the sound quality played by the record player can be effectively improved.

Computing systems and methods for estimation and correction of audio pitch variations resulting from eccentric rotation in the playback of phonograph records are disclosed. The methods include simulation of phonograph playback to generate eccentric and non-eccentric time bases for correction. Estimation of eccentricity parameters is done by a parameter optimization through evaluation of a spectral sharpness detection function on time-spectral content of audio data. Candidate audio data are generated using phonograph simulation while conducting an optimal parameter search. The disclosed technology further provides systems and methods to correct audio using such parameters to correct the induced pitch variations from eccentric phonograph record playback in order to improve the pitch stability of audio recordings. In addition, the physical properties of groove radius and playback speed variations in phonograph playback may be estimated from the eccentric record playback.