Settings

Open Settings from the gear at the top right of the window (it is on the start screen too), with ⌘, (Ctrl+,), or from File › Settings. The pages run down the left side.

In 0.2.7 the pages are General, Appearance, Transcriber, Speech, Remote, Version and About. 0.2.8 adds Shortcuts after Appearance and renames Remote to Automation. On a phone, or a window narrower than 600 pixels, 0.2.8 shows Settings full screen with its pages as a row of tabs.

General

• Language: the 25 the app ships in, each in its own name.
• Log level: Errors only, Warnings, Normal, Debug, Everything. Normal is enough for most reports; Debug or Everything when a report asks for it, and the file grows faster. CONCAT_LOG in the environment overrides it for one run.
• Downloads: where a model is fetched from first. Automatic, Concat’s mirror, a mirror for mainland China, the original source, or a custom URL of your own. Every other source is still tried after the one you pick.
• Magnetic timeline: whether deleting and trimming close the gap. The same switch is on the tray.
• Playhead: on, the playhead never leaves the content; off, a click on the ruler past the last clip lands it there.

Appearance

• Theme: Dark or Light. Dark is the default.
• Accent: Lime, Sky, Violet, Rose, Amber, Mint, or a Custom colour.
• Playhead: the colour of the line across the lanes.

Shortcuts

Every keyboard shortcut, with the keys it answers to. Click a row and press new keys to rebind it; Reset and Reset all put the shipped keys back. See keyboard shortcuts. Not on phones.

Transcriber

The Whisper models that auto-captions use, one row each: Tiny, Base and Small, each in an English and a Multilingual variant, with a line on what it is good for, accuracy pips and the size. Download fetches one; Remove deletes it; clicking an installed row makes it the one In use. Under the list: what is installed and how much disk it takes, and “Runs locally”. See the AI models.

Speech

The voice models that text to speech uses: Chatterbox Turbo (studio), Pocket TTS (cloning), Kokoro (compact) and Kokoro (full precision), with the same Download, Remove and In use controls.

Remote (Automation from 0.2.8)

Serves the Concat API while the window is open, so a script or another program can create, edit and export projects of its own. In 0.2.7: a Remote control switch, an Address (127.0.0.1 is this machine only; any other address is reachable from the network and needs the token), and a Token that a connection must present before its first call, with Show, Hide and New. The developer docs cover what to send it. Not on phones.

Version

The installed version and whether a newer release exists, with Check for updates. Switch version lists every release from 0.2.5 on, newer or older, and Install puts the one you pick in this one’s place. See update Concat. Not on phones.

About

The version, Show the log and Copy system information, then the facts a bug report needs: application, build, engine, operating system, processor, graphics, renderer, toolchain. From 0.2.8 an Intel Mac on macOS 12 also sees an AI features line saying they need macOS 13.4. See report a problem.