Measurement device, measurement method, recording medium, and phonograph record

A measurement device included in a record playback system including a record player, the measurement device comprising:

• a processor;
• and
• a memory,
• wherein the processor, by executing a program stored in the memory, is configured to:
• measure a frequency characteristic of each of a plurality of input signals which are input from the record player to the measurement device when a plurality of test signals for measuring a characteristic of the record playback system are played back by the record player, the plurality of test signals being recorded on a phonograph record and comprising a single test signal recorded a plurality of times to provide the plurality of test signals within a lap of the phonograph record, the plurality of input signals corresponding to the plurality of test signals recorded;
• calculate a measurement error between the frequency characteristic of each of the plurality of input signals measured and a predetermined frequency characteristic, which is the frequency characteristic of an ideal input signal input to the measurement device when the record player plays back a test signal;
• select a frequency characteristic of which the measurement error is smallest from among the frequency characteristics of the plurality of input signals, as a measurement result of the record playback system;
• and
• output the measurement result selected as the measured characteristic of the record playback system.