How to use Video Alignment Tool

The basics in 60 seconds

Say you recorded one event on two cameras and a voice recorder. You started each one at a different moment, so the same event happens at a different time in each file. The app works out those differences and gives you back files that all start at the same instant.

1. Add your recordings with the Add button.
2. Align them with the Align every track button.
3. Check by pressing Space to play them all together.
4. Export with the button, and choose a folder.

A few words you'll see throughout the app and this guide:

Track

One recording, meaning one file, in your project. Each track has its own colour.

Timeline

The strip at the bottom where every track is laid out against a shared clock, drawn as a sound wave.

Playhead

The thin vertical line on the timeline showing the moment you're looking at.

Reference track

The recording every other track is lined up against. Usually your best-quality camera or microphone.

Offset

How many seconds after the start of the timeline a track begins. Aligning sets this for you.

Drift

How far a device's clock runs fast or slow, in seconds per hour. For example, +1.93 s/h. The app corrects it when playing and exporting. See Clock drift.

Marker

A small flag pinned to a moment in a track. The app places one wherever it finds a match, and you can add your own.

In / Out points

Optional start and end points. Set them to export only part of the event.

1 · Install & first launch

Download the installer for your computer from the download page and open it.

Set up ffmpeg

The app uses ffmpeg, a free and trusted tool, to read and write audio and video. If your computer doesn't already have it, this window appears the first time you open the app.

2 · A tour of the window

The window is split into three areas, plus a status bar along the bottom.

You can resize the areas by dragging the borders between them, and rearrange them by dragging their title tabs. The app remembers your layout, and opens its window where you left it: on the same monitor, in the same place, and maximised if it was. If that monitor isn't connected, the window opens on your main one.

3 · Add your recordings

Click Add at the top of the Media list, or choose File → Add Media…, and select every recording of the event. You can select several files at once, and add more later.

Other formats that ffmpeg understands usually work too. Choose All Files in the file picker to see them.

You can also drag recordings from Finder or File Explorer onto the Media list. Drop a folder to add every recording directly inside it. Files of other types are left out.

• A small progress bar appears under each new file while the app reads its sound. This only takes a few seconds for most files. Saved projects remember what was read, so reopening one doesn't read it again.
• Rescan a file's sound wave with the beside it. When a project opens, the app does this by itself for any file whose size has changed. Use the button if a file was replaced with one of exactly the same size.
• Find a file on your computer with the beside it, which opens its folder in Finder or File Explorer with the file selected.
• Reorder tracks by dragging a file up or down the list. The timeline and video views follow.
• Remove a file from the project with the × beside it. The file on your computer isn't touched.
• "No audio, cannot be auto-aligned" means the file has no sound. You can still line it up using markers or by hand.
• "File missing" means a recording is no longer where the project expects it: moved, renamed, deleted, or on a drive that isn't plugged in. Its video shows the same message, and its track turns grey but keeps its sound wave. Click Locate… and choose the file where it is now. The track keeps its timing, markers and settings. If other missing files are in the same folder, the app offers to fix them too, and it warns you if the file you chose looks like a different recording. Plug a drive back in and its files come back by themselves. Export leaves missing files out.

• "Drive not responding" means the drive or network-share that a recording is on didn't answer within a few seconds. The track turns grey, and the app keeps checking periodically. Once the drive answers, the track goes back to normal. If the drive is gone for good, Locate… is still available on the card.
• "Not downloaded" (Mac only) means the recording is in an iCloud, Dropbox, OneDrive or Google Drive folder but isn't stored on this computer yet. The app doesn't play or scan it until it's fully available. Click Download, or let your sync app download it. It will come back online in the app once it's available. Exporting or aligning it automatically triggers a download of it first.
• "Still being written" means the file's size keeps changing, because it's still being copied, synced, or otherwise being actively modified. The app waits until it stops, then reads it again. The same happens to a file when it is being replaced while the project is open.
• "Can't be read" means the file is there but the app couldn't make sense of it, often because it is being actively modified. The app tries again each time you come back to the app.
• "Previewing via …" means the app can't play the format directly, so it made a lightweight preview copy (a proxy). This happens a lot with AVCHD .mts camcorder files. Alignment and export always use your original file.

Joining files a camera split up

GoPros, other action cameras and some camcorders split a long recording into several files of a few minutes each. Join them into one before aligning, using Merge.

1. Click Merge, then Add in the window that opens, and select all the pieces of one recording. You can also drag the pieces onto the window's file list from Finder or File Explorer.
2. Check the order. The app sorts the pieces into recording order for you, which matters because GoPro file names don't sort correctly on their own. To change the order, drag the pieces or use the and buttons. Sort puts them back in the app's order.
3. Check the Destination folder and File name for the joined file. The app warns you if the folder doesn't have enough free space.
4. Choose a Method:
   • Quick merge is the default. It joins the pieces as they are, in about the time it takes to copy the files, with no loss of quality. Every piece must use the same camera settings.
   • Re-encode creates a completely new file. It's much slower, but works even if the pieces differ, and unlocks the format settings, the same ones as in Export settings. Sound-only file types are greyed out for video, because a merge keeps the picture. If the pictures have different shapes, choose: Fit to add black bars, Fill to crop the edges, or Stretch.
5. Leave Keep telemetry and metadata on to carry over GPS and motion data from cameras that record it, where the file type allows.
6. Leave Add the merged file to the project on to use the joined file straight away, or turn it off to only write the file.
7. Click Merge. When it finishes, the app adds the joined file to your project, or shows you where it is. You can cancel at any time and return to the window with your choices intact.

Converting files to another format

Transcode makes a new copy of one or more files in another format: an MOV as an MP4, a 4K recording at 1080p, or just the sound as a WAV. Each file gets a new file of its own, with settings of its own, and the originals are left alone.

1. Click Transcode, then Add, and select the files. You can also drag them onto the list.
2. Click a file in the list to show its settings below. Each file has its own, and files you add start with the settings of the file selected at the time.
3. New files go next to the originals, with _transcoded added to the name. Use Browse to choose a folder instead, or change the Name suffix.
4. Choose the File type first, then the formats that go in it. The settings are the same as in Export settings, plus Keep original, which copies the picture or sound without changing it. Keeping both only changes the file type, which takes seconds. Keep original is greyed out when the file type can't hold the original, and says why, for example "MP4 can't hold PCM". Choose a sound-only type such as WAV or MP3 to save just the sound. Match source means each file's own size, frame rate or format.
5. To make quiet sound louder, or bring loud sound down, tick Normalise and set the level the loudest moment should reach, as a percentage of the maximum or in dB, whichever Preferences is set to: 100% is 0 dB, and 50% is about −6 dB. It's off to begin with and set to the maximum. Each audio stream is turned up or down as a whole, so its left and right stay balanced. The app reads the file once first to find its loudest moment, so it takes a little longer. Normalising needs the sound re-encoded, so it isn't available with Keep original. With AAC or MP3 the result can land slightly above the level, so leave a little room, such as 89% (−1 dB), if it matters.
6. Turn on Add the new file to the project if you want to use it straight away. It's off by default.
7. To give a setting to every other file, click the Apply to all button beside it. It's greyed out when they all have it already. To set up several files at once, apply a saved preset to each one.
8. Click Transcode. The files are converted one after another while you carry on working. You can close the window: progress shows in the status bar, and clicking it, or Transcode again, opens the window to check on them or add more files.

Each file in the list shows its source (length, picture size, frame rate, and the video and audio formats with their bitrates) and, in green after an arrow, what it will be converted to. Hover over that line to see the new file's name and folder.

• The button on a finished file shows it in Finder or File Explorer. Clear finished clears completed files from the list.
• Files waiting their turn in the queue can still be changed: click one and change its settings. A file that's already converting or finished shows the settings it used.
• A waiting file whose settings can't be used as they are, such as a name another file already has, is marked on hold and skipped until you fix it.
• If you open another project before a file finishes, it won't be added to the new one.
• Quitting while files are still converting asks first, because it would stop the conversions.

4 · Align automatically

Automatic alignment compares the sound in each recording with the sound in the reference track, and moves each track to where it matches. It works whenever the microphones heard the same things. They don't need to sound identical.

1. Choose the reference track, if you want to. The app uses the first recording with sound unless you click the button on another track's header in the timeline. Pick the recording with the clearest sound, ideally one that runs for the whole event.
2. Click "Align every track" in the timeline toolbar. It's the button, just right of . To align a single recording instead, click its header to select it, then click the button.
3. Check the settings and click Align. A window shows which track everything is matched against, whether only a selection is compared, and this project's alignment settings. Usually there's nothing to change: just press Enter.
4. Wait a moment. The toolbar shows progress, and the button cancels. A few minutes of audio takes seconds. Hour-long recordings take longer.
5. Read the report that opens when it's done, described below. The timeline zooms out to show the whole aligned project.

Alignment settings

The window that opens before aligning holds this project's settings. They're saved with the project, so a project with difficult recordings keeps what you chose for it. Anything you leave alone says from Preferences and follows your Preferences. Reset to Preferences puts every setting back.

To align without the window, untick Show before every alignment. Then an Align button starts straight away. Hold Alt, or ⌥ Option on a Mac, as you click it to see the settings again. The same switch is in Preferences.

Reading the alignment report

The app leaves a small marker at each matched moment, so you can jump to any of them later and check by eye and ear.

When a sync is approximate

Sound is slow compared with light. It travels about a third of a metre every millisecond, so at 30 fps it covers about 11 metres in one frame. A microphone across the room hears a voice later than one beside the speaker. When people talk from different places, two microphones far apart don't share one delay. Each voice reaches them a little differently, and the best match depends on who is talking.

The app checks how well the matched moments agree, and acts on it:

Frames are counted at the slower video's frame rate, or at 25 fps when both tracks are audio only. To make an approximate track exact:

• Watch and listen where someone close to that camera is talking, or at a clap, and nudge it a frame at a time.
• Or select a stretch where someone near that camera's microphone is talking, and align the track again from just that stretch.
• For an exact result, put markers on the same clap in each track.

A match can also be off without the app noticing. If one person does all the talking in the stretch it compared, every moment agrees, even when the microphones were far apart. With microphones more than about 10 metres apart, check by eye.

Clock drift

Every camera and recorder keeps time with its own clock, and no two clocks run at exactly the same speed. The difference is tiny, usually a fraction of a second an hour and sometimes a couple of seconds, but it builds up the longer you record. Two recordings lined up perfectly at the start slowly slide apart. Take a camera whose clock gains 2 seconds an hour, an ordinary amount:

On a short clip that hardly matters. On a long one it does. A few hundredths of a second between two microphones already makes voices sound hollow or doubled, and a little more puts lips visibly out of step with speech.

So for long recordings, lining up the start isn't enough. When the app aligns, it also measures how fast each track's clock runs compared with the reference, and corrects it. During playback and in every export, it plays that track very slightly faster or slower, so it stays in sync from the first second to the last. The change is far too small to hear as a change in pitch. The report and the track header show what it found, such as -1.14 s/h: that camera's clock loses 1.14 seconds an hour.

5 · Check the result

Play the project, then watch and listen. Lips should match voices, and a clap or a door slam should happen at the same moment in every view.

• Play / pause with the button or Space. The buttons either side jump back or forward by one frame, 5 seconds or 30 seconds. The menu on the right sets the playback speed, from ¼× up to 8×.
• Play with return with the button or Shift+Space. When playback stops, the playhead goes back to where it started, so you can hear the same moment again. Clicking elsewhere while it plays doesn't change where it returns to.
• Play just a selection by selecting a stretch of time first. Playback starts at the playhead if it's inside the selection, or at the selection's start if not, and stops at its end.
• Jump to a moment by clicking anywhere on the timeline, or drag along the time ruler above the tracks to scrub.
• Zoom the timeline by scrolling over the tracks, pinching on a trackpad, the toolbar buttons or the + / − keys. Press F to fit everything.
• Move through time by swiping sideways on a trackpad, or by holding Shift and scrolling. A swipe keeps to the direction it started in, so zooming doesn't wobble into panning. To change direction, swipe the new way for half a second, even while the last swipe is still gliding. You can change that time in Preferences. Move up and down the tracks by holding Ctrl / ⌘ and scrolling, or by scrolling over the track headers.
• Jump between markers with , and . to hear the matched moments one after another.

Controls on each track

Click a track's header to make it the active track. It gets a bar down its left edge, and buttons like Align active track act on it. Hold Ctrl / ⌘ or Shift while clicking to select several tracks. Drag a header up or down to reorder tracks. Drag the right edge of the headers to widen them for long file names; double-click the edge to narrow them again.

Mute, solo, mono and volume only change what you hear while checking. They never change the exported files, and they aren't Undo steps. They are saved with the project.

Make a track taller to see more detail in its wave: drag the line below it downwards. Hold Alt while dragging to resize every track at once, and double-click the line to return to the normal height, which is also the smallest.

Make a quiet track's wave taller with the + and − buttons at the timeline's right edge, level with the track. The number between them shows how much it is enlarged, up to ×64; click it to go back to ×1, or Alt-click it to enlarge the wave as far as it goes with its loudest moment still fitting in the row. You can also scroll over those buttons, hold Alt and scroll over the wave, or press Alt++ / − for the active track. This only changes how the wave is drawn, never how loud anything plays or exports. It is saved with the project.

Seeing the frequencies

Click Spectral view, below Export settings in a track's header, to see its sound as a spectrum instead of a wave. Time still runs from left to right. Up the track is pitch, from 20 Hz at the bottom to 20 kHz at the top, with each octave the same height and marked at the left edge. Colour shows how loud each pitch is: white is loudest, then yellow, orange, red, purple and blue, down to black for silence. A spectrum shows sounds a wave hides, like a clap under loud music, a whistle or a hum, and makes the same sound easier to spot in two recordings.

The first time a track is shown this way, the app analyses its sound, which takes about half a minute per hour of audio. Until then the track shows its wave with a progress bar, and Cancel stops the analysis and keeps the wave. Click the button again to go back to the wave at any time. Alt-click it to switch every track, or press S for the active track.

• Look closer at some pitches by holding Alt and scrolling over the track. It zooms in around the pitch under the pointer, so point at the bass to look at the bass. Hold Alt+Shift and scroll to move up or down. While zoomed in, the range shown appears at the track's top right, like 200 Hz–3 kHz. Click it to reset the range and see everything again.
• Brighten a quiet recording with the + and − buttons at the timeline's right edge. They set the brightness instead of wave height for a track shown as a spectrum. At ×2, a sound 6 dB below full scale shows as white; at ×4, one 12 dB below. Alt-click the number to make the loudest moment white. Alt++ / − does the same for the active track.

Which tracks show a spectrum, and how each is zoomed and brightened, are saved with the project. The spectra themselves are saved in a second file beside the project file, using a derived name: a project called Shoot.valproj keeps them in Shoot.valproj-spectra. About 35 MB of data is stored per hour of audio. The project opens without waiting for them: each track shows its wave until its spectrum has been read. Keep the two files together when you move a project; without it, the spectra are analysed again when shown. To analyse every track as it's added, or to turn spectral view off, see Preferences.

6 · Sync using markers

Use markers when automatic alignment can't find a match. That usually means a camera with no microphone, recordings made in different rooms, or very noisy sound. You mark the same real moment in each recording, and the app lines the marks up.

Good moments to mark are short and obvious: a hand clap, a loud laugh, applause, a door closing, a nearby car horn.

1. Find the moment in the first recording. Click the track's header to make it active, then move the playhead to the exact moment. ← and → step one frame at a time.
2. Add a marker with the pin button in the toolbar, or press M.
3. Repeat for each recording, marking the same moment in each. It doesn't matter where the tracks currently sit on the timeline.
4. Click "Sync every track from markers" with the button in the toolbar. To sync one track, select it and use Sync active track from markers, the button.
5. Read the report. For each track it shows how closely the marks agree, such as ±2.1 ms, and warns you if one marker is far from the others.

7 · Adjust by hand

You can always move a track yourself, whether to fine-tune a result or to place a recording that has nothing to match against.

Dragging on the timeline without Alt selects a stretch of time instead. Use that for aligning part of an event or exporting just that region. – Requiring Alt to move tracks stops you moving one by accident.

8 · The video views

Every camera appears as a tile in the Video area. Tiles play in step with the timeline. When the playhead is before a camera's recording starts or after it ends, its tile shows the first or last picture, dimmed, with No video data over it.

• Make all tiles bigger or smaller with the slider at the top right, or the and buttons either side of it.
• Zoom into one view to check a detail like expression or a hand gesture. First click the button to unlock the adjustment controls. Then you can:
  • use the tile's vertical slider, or hold Ctrl / ⌘ and scroll over it, or pinch on a trackpad
  • drag inside the tile to pan around the zoomed picture
  • drag the tile's bottom-right corner to make just that tile bigger or smaller, and double-click the corner to return it to the shared size
  • double-click anywhere inside the video frame to reset any zoom
• Click the button again to lock the views so they can't be moved by accident. The button resets the zoom on every view.

Zooming here only changes what you see in the app. It doesn't affect the exported files.

9 · Export

Exporting writes a new copy of each recording, trimmed and padded so that every file starts and ends at the same instant and is exactly the same length. Where a recording hadn't started yet or had already stopped, the app fills the gap with a black picture and silent audio.

The app never changes your original files.

Choose the part to export

• Whole project runs from the earliest start to the latest end of any recording. The app uses this if you set nothing else.
• In to Out uses points you set. Move the playhead and press I for the start and O for the end, or use the and buttons in the toolbar. Clicking near the start or end of a recording snaps the playhead onto it exactly.
• Selection uses a stretch of time you drag across on the timeline.

Run the export

1. Click the Export button in the toolbar, , or choose File → Export….
2. Pick a Range. The app preselects the most specific one you've set.
3. Under Tracks, every track is ticked to begin with. Open the list to untick the ones you don't want, or tick All tracks to take them all again. The list stays open while you tick.
4. Click Browse to choose the folder to Save to.
5. Add to each name goes on the end of each original name, so Interview.mp4 becomes Interview_sync.mp4.
6. Check the list of files. Each row shows the name the new file will have, including its type, such as Interview_sync.mp4 or Zoom_sync.wav, what it will contain, and the recording it's made from. Click to change that track's format, or to leave it out. Two recordings with the same name get a number, such as GX010001_sync (2).mp4, so neither is written over.
7. A row with a warning needs sorting out before you can export: a missing file, a format that can't be written, or a file of the same name already in the folder. For the last, turn on Replace existing files, or change what's added to each name.
8. Click Export. The settings are then locked, and the list shows each file's progress and the time remaining. You can close the window, and the export carries on with its progress in the status bar. Cancel all stops it.
9. Click beside a finished file to show it in Finder or File Explorer. The finished list stays until you click Clear, so you can reopen the window later to check the results. Clearing it unlocks the settings for your next export.

Format & quality for each track

By default each exported file keeps its original's picture size and frame rate at similar quality, saved as an MP4 with H.264 video and AAC sound. Nearly everything can play that. A recording of sound only keeps its own type: a WAV stays a WAV and an MP3 stays an MP3, and other types become M4A. You only need these settings if you want something different, such as smaller files or a format for a particular editing program.

Click the button on a track's header to open its settings.

• Copy to applies the same settings to every other track, or to the tracks you've selected.
• Save these settings stores them as a named preset, and Apply a preset uses one. Presets work in every project, and in Merge and Transcode too.
• Reset returns the track to matching its original.

10 · Save your work

A project remembers your recordings, their alignment, markers, In/Out points and export settings, so you can come back to it later.

• Projects are saved as .valproj files. They point to your recordings rather than containing copies. Keep the recordings where they are, or keep the project in the same folder as them, or a folder above them. Then you can move or copy the whole folder, or open it from a drive that now has another letter or name, and the project still finds its recordings. If they can't be found, the project still opens, and you can locate them. A project also keeps each recording's sound wave, about 1 MB per hour of audio, so it opens without reading the recordings again. Tracks shown as a spectrum keep theirs in a second file beside the project, ending .valproj-spectra. Move or copy it with the project.
• Autosave keeps a recovery copy of unsaved changes every 15 seconds. If the app closes unexpectedly, it offers to Recover your work the next time it opens. This never overwrites your saved project.
• The app asks before closing if you have unsaved changes.

11 · Preferences

On a Mac, open Preferences from the app menu. On Windows and Linux it's File → Preferences…. The shortcut is ⌘+, or Ctrl+,. Changes save as you make them and apply to every project.

Hardware acceleration

Most computers have a video engine in their graphics chip (GPU) that reads and writes video much faster than the main processor (CPU). With hardware acceleration on, which it is by default, the app uses it for preview proxies, exports and joined files. It looks for Apple, NVIDIA, Intel and AMD video engines.

The GPU handles H.264 and HEVC, and ProRes on a Mac. Other formats, and all audio files, always use the CPU. If the GPU fails on a file, the app automatically restarts the process on that file again using the CPU.

The GPU and CPU badges in the status bar light up while ffmpeg is working on each, and both can be lit at once. Hover over one to see what it's doing; click it to open Preferences. Turn off the video acceleration setting to do everything on the CPU: it's slower, but gives a slightly better picture for the same file size.

12 · Keyboard shortcuts

Shortcuts work while you're using the timeline area. They're off while a window or text box is open. Press ? in the app to see this list. On a Mac, Alt is the ⌥ Option key, and Ctrl is ⌘.

These are the defaults, and you can change any of them. Open the list with ?, the keyboard button at the right of the timeline toolbar or of the status bar, or Keyboard Shortcuts… in the app menu (the File menu on Windows and Linux).

• To change a shortcut, click it and press the keys you want. Esc cancels.
• If another action already uses those keys, the app tells you which one. Choose Reassign to move the keys to the new action, which leaves the other action without them.
• The × beside a shortcut removes it. The ↺ button puts back the default, and Reset all to defaults… puts back every one.
• Keys your computer uses everywhere, like copy, paste and quit, can't be reassigned. Menu commands need Ctrl / ⌘ (or an F key), so typing in a box can't set them off.

13 · Troubleshooting

A track was not moved during auto-alignment:

• If the recording started more than 5 minutes before or after the reference, raise the Search window and align again.
• Make sure the track actually overlaps the reference in time. A recorder that only ran after the reference camera stopped has nothing in common with it. Choose a longer recording as the reference.
• If the report says the result was only a guess, or the moments disagree, select a longer stretch where both recordings clearly hear the same thing, and align again.
• If it says no convincing match and the microphones were far apart or the room was noisy or echoing, lower Match strictness for the project, or for just that track, and align again. Then check the result.
• If the sound is very different, say from another room or with heavy background noise, manually sync using markers instead.

A track was moved to the wrong place:

• Undo, select a stretch where both recordings clearly hear the same thing, such as speech or a clap, and align again.
• If you know roughly how far apart the recordings started, lower the Search window to just above that, so the app can't settle on a sound that merely repeats elsewhere.
• If you lowered Match strictness, raise it again.
• Sync it with markers instead.

The report says "Approximate":

The track was moved, but could be out by the time shown. Check it and nudge it by hand. See When a sync is approximate.

The report says "drift not measured":

The track and the reference shared too little sound for the app to measure clock drift, or you aligned from a stretch too short to trust across the whole recording, so only its start time was set. For a short clip that's fine. For a long one, check that both ends stay in sync. If they don't, align it again with no selection, or with a longer one, against a recording it overlaps for longer, or sync it with two markers far apart.

The bottom-right corner says "ffmpeg not set up" or "too old":

Click the message and choose Download ffmpeg for me. The app needs ffmpeg version 4.2 or newer.

A video shows black, or "Proxy build failed":

The app couldn't play that format directly and couldn't make a preview copy. Usually that's because the folder beside the original is read-only, like a camera's memory card. When asked where previews should go, choose Use the app proxy folder. Alignment and export still work either way.

A file says "File missing":

The recording has been moved, renamed or deleted, or its drive isn't plugged in. Plug the drive in, or click Locate… on its card in the Media list and choose the file. See missing files.

A file says "Drive not responding":

The network share or drive it's on has stopped answering. Check the connection, or wake the drive. The file comes back by itself within a few seconds of the drive answering again.

A file says "Not downloaded":

It's stored in the cloud, not on this computer. Click Download on its card, or make it available offline in your sync app. See cloud files.

An export says "The GPU could not encode this file":

The graphics chip refused that file, so the CPU exported it instead. Nothing needs doing. If it happens every time, turn off hardware acceleration.

Windows says "Windows protected your PC":

Windows shows this for apps it hasn't seen downloaded many times. Click More info, then Run anyway.

Playing backwards has no sound

That's expected. Pressing J steps backwards through the pictures instead of playing the recording in reverse.

An exported MP3 is slightly behind the others

Some apps don't skip the short silence every MP3 starts with, so the file plays about 25 ms late. Export that track as WAV or FLAC instead. See Format & quality.

How do I update?

When a new version is out, a notice appears in the status bar. Click it to read what's new, then click Download to open the download page in your browser. Install the new version over the old one. Your projects and preferences are kept.

How do I report a problem or suggest something?

Choose Help ▸ Send Feedback…. Pick what kind of feedback it is, describe it, and add your email address if you'd like a reply. The app adds its version and your system details, and What's sent besides your text shows them before you send. Reports go to the developer privately.

If something goes wrong, such as an export that fails or the window stopping, the app offers to report it with the error details included. Untick them if you'd rather not send them. A failed alignment, export, merge or transcode also has a Report… link beside its error. Without the app to hand, use the Feedback page.