If you want to turn keyboard audio on, choose a pack and get on with typing, menu controls may be enough. If a script must change playback, look for a documented command interface. If you want the sound engine to run with no window, webview or tray, check for a separate headless mode. These are different features.
I’m Levin, Klakk’s developer. I prepared this comparison with AI assistance and checked the linked official sources on October 12, 2026. The competing command behavior described here comes from release documentation and published source, rather than our running every binary, shortcut or automation workflow.
Choose the control you will actually use
A July 16, 2026 MechvibesDX request asked for a headless CLI mode so the app could run without a window. Separately, a July 2026 Thock report said its CLI worked while the menu interface did not, but found the CLI less intuitive. These are bounded reports from those products, not a measure of how many people want command-line sound software.
| Your requirement | Look for |
|---|---|
| Change volume or pack occasionally | Clear menu or tray controls |
| Pause audio while keeping other computer sound | An app enable switch or toggle shortcut |
| Have another local tool choose a pack or enable playback | Documented commands and a running-app requirement |
| Run playback without a graphical interface | A headless playback mode with a clear exit control |
Closing a settings window does not make an app headless. A utility can keep its tray or menu-bar process alive after you close that window. Likewise, a CLI can simply send instructions to a graphical app that is already running.
For ordinary typing, choose the least setup you need. A scriptable interface is useful only if its supported commands match the workflow you intend to build.
Klakk: included sounds with menu controls
Klakk’s website Mac 1.4.1/build 23 and Windows 1.4.1 editions provide 14 included mechanical sound packs, volume, output selection and enable/disable controls. The pause guide covers the menu, Windows tray and toggle shortcut.
There is no documented public Klakk CLI for selecting packs, setting playback volume or controlling a headless sound engine. Launching an executable from a shell does not establish that it accepts those commands. Choose a tool with a documented interface if external command control is a purchase requirement.
If the ordinary controls fit, hear the 14 included sounds before downloading. The installed app is what supplies playback while you type elsewhere; the browser preview supplies sound within that page.
Thock: commands that control the running Mac app
The open-source Thock 1.23.0 release includes a sound-pack registry and a CLI list command. Its official README describes free downloads, macOS 13.5 or later, and command integration alongside its menu interface.
The release’s CLI script can list installed sound packs and send pack-selection or enable commands to Thock. Pack selection and enable control require the app to be running and to have created its local communication pipe. The script explicitly reports an error if that pipe is missing.
Its published app-side listener handles set-soundpack and set-enabled. This is a controller for an existing app process; the script is not an independent audio engine. Listing installed packs is a separate operation from asking the app to play one.
That distinction matters when choosing a tool for Raycast, Alfred or your own script. Check the commands you need, how the CLI is installed and how the app is launched. Do not assume every launcher integration ships automatically with the app, or that a command interface removes its keyboard-permission requirements.
For the purchase itself, compare extension prerequisites and host licenses before treating a controller or workflow as a complete free sound app. The sound engine, launcher and control download can have different entitlements; an existing compatible license can change which additional purchase you need.
Thock is free and MIT-licensed. Its release notes mention Accessibility permission; we have not run its CLI or independently measured its responsiveness. A source-accessible command path is a useful selection criterion, rather than proof of a latency or privacy advantage.
MechvibesDX: a published headless launch path
The DX request was first declined, then reopened. An August 13 maintainer reply described headless support landing on main for a later release. Closing the issue alone would not prove that a downloadable version contains it.
The current 0.8.3 release, dated October 7, 2026, has a tagged launch parser and headless implementation. They define --headless as playback with no window, webview or tray, using the saved settings. Pack overrides through --soundpack and --mouse-soundpack are defined for that run rather than as persistent settings changes.
The published headless path describes Ctrl+Alt+M as session mute and Ctrl+C as exit. It reuses input capture rather than replacing it with a different, permission-free listener. These are published source and maintainer descriptions, not our confirmation of every released binary or input combination.
DX is free and MIT-licensed. The 0.8.3 release lists a Windows x64 installer and an Apple-silicon Mac DMG. Its Mac distribution is described as ad-hoc signed and not notarized; the release page and bundled Mac README disagree about the testing label. It has no Intel Mac DMG in that release. Check your chosen asset and normal system security requirements; this comparison does not provide security-bypass steps.
A headless flag is worth considering when you specifically want that launch shape. It does not establish a supported background service, remote-control API, CPU saving or better playback timing.
Keep legacy Keyboard Sounds separate from Pro
Keyboard Sounds also documents a standalone Python CLI. PyPI currently lists 6.4.3, released March 1, 2026, with Python 3.7 or later as package metadata. Its README directs CLI users to kbs --help and distinguishes the sound daemon from the desktop application.
That project now says it receives bug fixes but no new features, with development moved to Keyboard Sounds Pro. Do not copy an old kbs command into Pro merely because both products share a publisher. Check the installed package’s help and requirements. A Python version requirement alone does not prove successful keyboard capture or audio on every current operating system.
Compare the sound after the interface fits
First decide whether you need a menu, commands to a running app, or a headless process. Then confirm the sound you want and the actual download’s architecture, permissions and maintenance status. If you need your own recordings, use the custom-pack comparison as a separate filter.
For Klakk’s website editions, the trial lasts three days from first launch. Continuing costs US$4.49 once per platform, plus applicable tax. Mac supports macOS 14+ on Apple silicon and Intel; Windows supports Windows 10/11 with native x64 and ARM64 builds, and the installer is unsigned. Website Mac, Windows and App Store licenses are separate. Choose a website download.
Klakk processes input events and key codes locally without uploading typed text or raw keystrokes. Usage analytics and licensing communication still occurs; Mac also has settings analytics. Read the Mac privacy policy or Windows privacy policy for the edition you install. A hidden interface does not, by itself, establish what an app observes or sends.
Frequently asked questions
Does closing the settings window make a sound app headless?
No. Its menu-bar or tray process can remain active. Headless describes a launch mode without a graphical interface, rather than merely a closed settings window.
Can I use Klakk’s command line to change sound packs?
The current website editions have no documented public command interface for pack selection, playback volume or a headless sound engine. Their supported controls are in the app’s menu, tray and settings.
Does Thock’s CLI replace the Mac app?
The published 1.23.0 CLI sends playback controls to the running app through a local pipe. It does not replace the app’s audio process. Listing installed packs is a separate operation.
Does headless mode eliminate keyboard permissions or guarantee lower latency?
No. It changes the interface and launch shape. Input capture, permissions and audio conditions still need checking, and a missing window does not establish a measured timing advantage.