The tempo (BPM) cannot be measured or the tempo (BPM) measurement values are off.

There are two possible causes.

(1) Is the audio input level too high or too low? Adjust the [INPUT LEVEL] so that the channel level indicator lights up to about [0 dB] at the input sound’s peak level.
(2) Depending on the track, it may not be possible to measure the tempo (BPM). In this case, input the tempo manually using the [TAP] button.