Lab.Mescalina — Support

Support

Last updated: September 15, 2026

This page covers all five apps — Sandin FX, Q5K, PB7, RE7 and SCAN7. They share the same foundation: native macOS applications, computed on the GPU, played live and exported exactly as previewed.

A question, a problem, an idea?
Write to contact@mescalina.fr, mentioning which app you mean. We usually answer within two business days. The apps are made by a very small team: every message is read by the person who writes them.

Write to support

Requirements

System	macOS 14 Sonoma or later.
Hardware	Any Apple silicon Mac (M1 and later) or a recent Metal-capable Intel Mac. Rendering is computed on the GPU.
Inputs	Depending on the app: video files (MOV, MP4, M4V), images, PNG with transparency, camera, or titles and patterns set inside the app.
Output files	QuickTime `.mov` in H.264 or ProRes 422 / 4444 (PB7 also exports alpha in ProRes 4444). The source audio is kept on export.
Optional	A camera (built-in or USB), a USB-MIDI controller, a second display or projector.
Sandin FX	Also available in a Linux version (SDL2, OpenGL, FFmpeg), with the same files and presets.

Documentation

Each app has a Presentation (a full tour of the modules) and a Tutorial, in PDF, in French, English and Spanish. Find them on the Documentation page or from each app's page: Sandin FX, Q5K, PB7, RE7, SCAN7.

Frequently asked questions

macOS does not offer camera or microphone access

For the apps that take the camera as a source (Sandin FX, PB7, RE7, SCAN7) and for audio reactivity, permission is requested on first use. If you declined, re-enable it in System Settings → Privacy & Security → Camera (or Microphone), tick the app, then relaunch it.

Is the exported render identical to what I see?

Yes, for all five apps. The export is deterministic: oscillator and animation time follows the render's timecode, not the computer clock. Recorded gestures (knob movements) and your settings apply to the export as well.

Output window on a second display

Sandin FX, Q5K, RE7 and SCAN7 open a window that shows only the processed picture. Drag it to the second display or projector and go full screen (⌃⌘F). Controls stay on the main display and the output never freezes, even when the main window is hidden.

My MIDI controller does nothing

MIDI is handled by Sandin FX, Q5K and RE7. Connect the controller before launching the app, then open the MIDI window.

MIDI Learn: click a slider in the app, move the physical control, done. Mappings are saved.
Pickup mode prevents jumps: a physical fader takes over only after crossing the current value. Move it fully once.
The Korg nanoKONTROL2 maps in one click on Sandin FX and RE7.

Changing the interface language

The interface is in English by default on all apps. In the About window, the Language picker offers French; the change takes effect at the next launch.

Where are my settings, gestures and mappings?

In readable text files you can back up or delete. Edition bought from our website:

Sandin FX	`~/Library/Application Support/SandinFX/`
Q5K	`~/Library/Application Support/DPE5000/`
PB7	`~/Library/Application Support/PB7/`
RE7	`~/Library/Application Support/RE7/`
SCAN7	`~/Library/Application Support/SCAN7/`

On the Mac App Store edition, the same files live in the app's container (~/Library/Containers/…/Data/Library/Application Support/). The two editions do not share these folders. In the Finder, hold ⌥ while opening the Go menu to reveal Library.

Purchases, licence and reinstalling

Mac App Store edition	Your purchase from Apple is your licence. Reinstalling on your Macs, updates and refunds go through the App Store and your Apple account; we have no access to that information.
Edition bought from our website	A personal licence key per app, usable on two computers. To move to a new machine, release an activation or recover a lost key, write to us from the e-mail used for the order, or use Retrieve my key.

Reporting a problem

For a quick diagnosis, please include:

the app concerned (Sandin FX, Q5K, PB7, RE7 or SCAN7), its version (About window) and edition (Mac App Store or website);
your Mac model and macOS version;
what you were doing (file, camera, export, MIDI…) and what happened;
a screenshot if possible, and for a troublesome file, its characteristics (codec, size, duration).

Suggestions for new modules, presets or MIDI controllers to support are welcome.

Privacy

All the apps run entirely on your computer and collect no data. Details in the privacy policy.