Audio

Audio plays in preview, and exporting will retain audio unless specifically turned off.

Audio layers

An Audio layer is sound with no picture. Placing an audio file in a composition makes one. To take just the sound of an item that has a picture too, right-click the item in the Project panel and choose Add audio only.

An Audio layer has no visibility switch.

With Settings ▸ Timeline ▸ Sound moves in whole frames off, an Audio layer dragged by its bar lands where the pointer is, between frames.

Waveforms

In the Timeline, a Footage layer draws its audio waveform in its lane, and clips inside a Sequence layer draw theirs inside their own box. The drawing is trimmed and retimed along with the layer.

Settings ▸ Appearance ▸ Waveforms sets how waveforms are drawn.

Setting	Choices
Style	Plain draws one wave. Frequency splits it into low, mid and high bands.
Anchor	Centre draws the wave about the middle of the row. Bottom draws it up from the bottom.

Audio streams

A file can carry several audio streams, such as a screen recording with the game on one and the microphone on another. A file placed in a composition plays every stream, mixed. The Project panel’s preview card states how many streams a file has.

Right-click a layer in the Timeline, or a clip in the Cut timeline or the Audio timeline. The commands appear when the file has more than one stream.

Command	What it does
Audio streams	Lists the file’s streams. The layer plays the ticked ones, mixed. With several layers or clips selected, every one takes the ticks, as one undo step.
Split audio streams	Gives each stream a row of its own.
Merge audio streams	Puts the streams back on one row, mixed.

Split audio streams and Merge audio streams are also in Layer ▸ Audio.

A split Footage layer keeps its picture and its first stream. Each other stream becomes an Audio layer directly below, with the same span, Volume and effects.
A split clip keeps its first stream. Each other stream becomes a linked clip on an audio-only Sequence layer.
A split row is named after its stream where the file names it, and after its number otherwise.
Merging removes the Audio layers of the same file that start at the same time, along with their own Volume keyframes and effects. Locked layers stay.
Merging a layer that was never split sets it to every stream of its file.

Edit ▸ Settings ▸ Timeline ▸ Several audio streams arrive as sets what such a file becomes when it is placed in a composition. One layer, mixed is the default.

Choice	What is placed
The first stream	One layer playing the first stream.
One layer, mixed	One layer playing every stream.
A layer each	A layer for each stream.

A layer in a project from Lumit 0.7.0 or earlier plays the first stream until it is set to others.

The source view and the Project panel’s preview follow the same setting. They play the first stream, or every stream mixed for either of the other two choices.

Scrubbing

Hold Ctrl and drag along the ruler of the Timeline, the Cut timeline or the Audio timeline to hear the composition as the playhead moves. Each frame the playhead lands on plays a twelfth of a second of the mix from that frame. Ctrl+click on the ruler plays the frame under the pointer.

Beat markers

Lumit can read a composition’s audio and place a beat marker on each detected beat.

Composition ▸ Detect beats runs the detection.
Composition ▸ Clear beat markers removes all beat markers in the composition.

The Audio panel’s Beats section runs the same detection with a source, a sensitivity, a range and a tempo.

Audio offset

Settings ▸ Audio ▸ Audio offset lines the picture up with sound that is heard late on this machine, from −1000 to 1000 ms. Above zero holds the picture back; below zero holds the sound back. It applies while playing, and not to export.