This walkthrough from Mastering.com shows how Flex Time in Logic Pro lets you manually correct timing issues in audio, note by note.
Dragging a transient marker from above the region shifts the whole file. Grabbing it from the three-marker zone below moves just that phrase while keeping neighboring hits locked in place, so you can tighten specific sections without disturbing the rest.
The region's Quantize menu applies the same logic as MIDI quantization to audio, snapping performances to 8th, 16th, or triplet grids. This is especially useful for cleaning up rhythmic parts like hi-hats or strummed guitar that drift slightly off the beat.
Q Strength controls how hard that snap hits. Dialing it down to 65% or 45% pulls timing toward the grid without fully flattening it, keeping the recording tight while preserving the natural feel of the original performance.