Waveform view

The waveform view is the main visual reference for the audio content and timecode position. It shows the audio signal, the LTC signal, and optionally a video reference track, all on a shared time axis.

Track layout

The waveform area displays up to three stacked tracks:

• Music track (top) — the waveform of the audio file's music content; always visible when a file is loaded. Markers are drawn on it
• Video track (middle) — the audio waveform extracted from the video reference file, in green; visible when a video is loaded via Import Video
• LTC strip (bottom) — a thin strip showing the LTC channel; it is always drawn, whether or not the file contains LTC

Next to the LTC label, two buttons set how the strip is drawn. Whole song (the default) always shows the entire song, with a box marking the part the waveform above is showing when you are zoomed in — click the strip to jump there. Follow zoom makes the strip zoom and scroll together with the waveform above. LTCast remembers the choice on each computer.

Playhead and seeking

The vertical line across all tracks is the playhead — it shows the current playback position. To seek to a different position:

• Click anywhere on the waveform to jump the playhead to that position
• For a quick move with the mouse, drag the scrub bar under the waveform; it seeks when you let go. Holding → or ← scrubs from the keyboard

Dragging on the waveform does not scrub. Seeking during playback restarts the audio from the new position, so there is a brief gap in LTC audio while the encoder resets; MTC, Art-Net and OSC pick up the new timecode with the next frame. Seeking while stopped or paused only moves the playhead — the timecode display and the outputs update when you press Play.

Zoom

• Ctrl+Scroll (Windows) / Cmd+Scroll (macOS) zooms in and out, from 1 up to 5000 pixels per second
• The same gesture works over any of the lanes, and all lanes zoom together on one shared time axis, so the video track stays aligned with the music at any zoom level
• Zoom is centered on the mouse pointer

Pan

• Plain Scroll (mouse wheel or trackpad swipe) pans left or right along the timeline; Shift+Scroll does the same
• There is no drag-to-pan. Dragging the green video track moves the video's alignment instead (see Aligning video to audio)
• While a song plays, the waveform follows the playhead: once it is zoomed in, it scrolls so the playhead rests about two-thirds of the way across the view, so you see what is coming

LTC channel selector

The LTC channel is chosen in Settings → Devices, not above the waveform. The LTC Track selector there controls which audio channel is decoded as LTC:

• Auto-detect — LTCast picks the channel that looks most like LTC
• CH 1 to CH 4 — always decode LTC from that channel

The channel LTCast found is shown next to it as LTC detected on CH n. See Loading audio files.

Markers

Markers (cue points) appear as vertical lines on the waveform. They are used to label song sections, trigger events, or mark positions in the timeline.

• Add a marker — double-click an empty spot on the music waveform (or Ctrl/Cmd+double-click anywhere); see Adding markers
• Select a marker — single-click a marker line; click it again to deselect
• Move a marker — drag the marker line left or right; it snaps to frames, and to the playhead, other markers and beats (hold Alt to switch snapping off or on for that drag)
• Rename a marker — double-click it; clearing the name deletes the marker
• Marker menu — right-click a marker for rename, department, cue number, note, trigger mode, standby time and delete
• Delete a marker — select it and press Delete (or Backspace)

Gesture reference

• Click — jump the playhead
• Scroll — pan; Ctrl/Cmd+Scroll — zoom
• Double-click — add a marker, or rename the marker under the pointer
• Drag a marker — move it
• Right-drag — set the A/B loop (see A/B Loop)
• Drag the green video track — align the video