Keys: Space play from 0.5 s before the start · Shift+Space play from the start itself · H half speed · ←/→ ±10 ms · Shift+arrows ±100 ms · J/K next/previous · Enter verified and next · U unsure · click the waveform to set the start.

    Grey = LRC start (where every line begins), blue = the tool's proposal, white = your start, red = playhead.

    Blind check: no earlier times are shown. Play, click the waveform where the line starts, fine-tune, then Enter. Can't tell? Press U.