Frequently Asked Questions

Yes! All Fiavaion products are completely free to use for both personal and commercial purposes. We believe accessibility and creative tools should be available to everyone regardless of budget. Our development is supported by our amazing community through voluntary donations.

No. None of our products require account creation, registration, or login. Simply download and use—no strings attached.

No. We take privacy seriously. Our products process everything locally on your device—no data is sent to external servers, no telemetry is collected, and no tracking exists. Your data stays yours.

You can get help through several channels:

• Documentation - Browse our comprehensive guides
• GitHub Issues - Report bugs or request features on our GitHub repositories
• Community - Join our Discord or forums for community support
• YouTube - Watch tutorials and how-to videos on our YouTube channel

There are several ways to support our work:

• Donate - Support development through Patreon or one-time donations
• Spread the word - Tell others about our products
• Report issues - Help us improve by reporting bugs
• Suggest features - Share your ideas on GitHub

Fee-Ah-Vee-On (fee-AH-vee-on)

We know, we know. It's not exactly "Google" or "Apple." Our founder clearly prioritised "sounds cool" over "easy to say in conversation without sounding like you're casting a spell."

Acceptable alternatives include:

• "That accessibility extension thing"
• "The video wall app"
• "Fee-uh... Fava... you know what I mean"
• Just pointing at your screen

We won't judge. We've heard it all. Someone once called us "Flavor-ion" and honestly? We kind of liked it.

AssisT is available as a Chrome extension. It works on all Chromium-based browsers, including Google Chrome, Microsoft Edge, Brave, and Opera.

Yes! Most features work completely offline since all processing happens locally. Text-to-Speech uses your browser's built-in voices and reading modes transform content locally. Translation requires an internet connection but doesn't send your data to third parties.

Yes. By default AssisT processes everything on the device and sends nothing anywhere. Fiavaion collects no personal data and operates no server that receives it, so there is nothing for the institution to sign a data processing agreement over. AssisT is designed with FERPA principles in mind: no student data is collected. Under GDPR, Fiavaion processes no personal data; if a student switches on a cloud AI provider or a cloud translation provider using their own key, that provider becomes their own sub-processor. Text leaves the device only in that case. See the adoption pack for learning support and disability services.

AssisT is built and tested against WCAG 2.2 Level AA. The Accessibility Conformance Report covers all 55 Level A and AA criteria and is a self-assessment by the developer, not an independent audit: five criteria are rated Partially Supports and the rest Supports. axe DevTools and WAVE were run by hand during the 0.9.3 assessment, and manual keyboard testing is done on every release; there is no automated accessibility gate in CI. Screen-reader testing with NVDA, JAWS and VoiceOver has not been done, and a third-party audit is planned but not yet commissioned.

AssisT translates into 14 languages: English, Spanish, French, German, Italian, Portuguese, Dutch, Polish, Russian, Chinese, Japanese, Korean, Arabic and Hindi. The default provider is MyMemory, which needs no API key and works out of the box. DeepL and Azure Translator are optional alternatives if you have your own key for them.

AssisT offers three specialised reading modes:

• Bionic Reading — emphasises the beginning of each word to guide your eye through text faster
• Syllable Highlighting — colours alternating syllables so word structure is visible, which supports phonetic decoding
• Grammar Colour-Coding — colours words by part of speech: nouns, verbs, adjectives

Toggle these from the AssisT popup or use keyboard shortcuts.

AssisT ships with 12 built-in profiles: Default, Reading Mode, Quiz Mode, Low Vision, ADHD Focus, Autism Comfort, Dyslexia Support, Sensory Sensitive, Night Study, Anxiety Calm, Motor Impairment and Low Vision STT. Each one sets defaults such as reading speed, highlight colours, font preferences and which features are switched on. You can also create your own.

Use the Screenshot & OCR tool to capture any part of your screen. AssisT will extract text from the captured area, which you can then read aloud, copy, or translate. Perfect for working with scanned documents, images, or PDFs that aren't text-selectable.

• Windows: Windows 10 version 1809 or later, or Windows 11, 64-bit
• Runtime: none to install — the Windows build is self-contained and bundles .NET 9
• GPU (Windows): a Direct3D 11 capable graphics card
• macOS: in development — no build available yet
• Storage: an SSD is strongly recommended for smooth playback

The Windows build is not code-signed yet, so SmartScreen may warn on first run: choose More info → Run anyway. Signing is planned.

macOS is in development: the portable core already builds and passes its tests on a Mac, and the Metal renderer and VideoToolbox decode path are being written. There is no macOS build to download yet. Linux is not supported.

MultiMon reads .mp4, .mov, .mkv and .avi containers. Inside them:

• GPU-accelerated: HAP and HAP Q, decoded by MultiMon's own from-scratch decoder
• Standard: H.264 and HEVC, decoded on Windows through Media Foundation

For best performance with video walls, we recommend converting to HAP format.

HAP is a video codec designed for real-time playback. Unlike H.264 which requires CPU decoding, HAP uses GPU-native compression—your graphics card decompresses it directly with minimal CPU usage.

Benefits:

• 5-15% CPU usage vs 30-60% for H.264
• Smoother multi-monitor playback
• Frame-accurate timing
• Better synchronisation

Trade-off: HAP files are 4-8x larger than H.264. See our HAP Codec guide for details.

Only if you want to use the built-in HAP converter. FFmpeg is not required for playing videos. If you want to convert videos to HAP format, install FFmpeg from ffmpeg.org and MultiMon will detect it automatically.

Yes. Everything runs off one master clock, and each source shows the nearest frame at or before master time, repeating or dropping a frame as needed.

Span (one source stretched across every screen) and Split (one source cut into a grid) are inherently in sync, because there is only one source. Individual mode plays a different source per monitor and has a Sync checkbox that locks those sources to the same shared clock. See our video sync guide.

A .mmproj file is a MultiMon project: the JSON document that stores your mode, which source is on which monitor, the grid size when you are in Split mode, and your mixer settings. It is the only project format MultiMon uses.

Projects are written as schema v2, and older v1 files are migrated automatically when you open them. Use New, Open project and Save project in the main window to manage them, and only open .mmproj files you created yourself.

There is nothing to configure. On Windows, H.264 and HEVC are decoded through Media Foundation using hardware decode where the machine supports it, and MultiMon falls back to software decoding automatically when it does not. HAP and HAP Q are uploaded straight to the GPU as compressed textures by MultiMon's own decoder.

If the GPU is reset or a display is removed while you are playing, MultiMon recovers and resumes from the master clock.

HAP uses GPU-native texture compression (DXT/BC) which is designed for fast decompression, not small file sizes. A 1080p video at 30fps:

• H.264: ~1-2 MB/second
• HAP: ~6-8 MB/second
• HAP Q: ~12-16 MB/second

This is the trade-off for smooth, low-CPU playback. Use an SSD for best results with HAP.

The AUDIO MIXER is built into the main window, so there is no separate dialog to open. Each track gives you volume, pan, mute, solo and an optional output device, and every track is clocked to the same master timeline. On Windows this runs through WASAPI in shared mode, so MultiMon coexists with your other audio.

MultiMon does not do per-channel routing, routing presets, test tones or surround upmixing. See our audio mixer guide.

Try these steps:

1. Move files to SSD - Hard drives often can't keep up with high-bitrate video
2. Convert to HAP - GPU-accelerated playback reduces CPU load
3. Update GPU drivers - Outdated drivers cause issues
4. Close other applications - Free up system resources

Recommended workflow:

1. Build and test your setup, then save it as a .mmproj project file
2. Use Convert to HAP on your videos for reliable playback
3. Copy the project and its videos to the venue computer and open it there
4. Use Identify screens to confirm each monitor is showing what you expect
5. Press F11 to go into perform mode

While performing, Space pauses and resumes and Esc exits. Those three keys are the whole performance interface, which is what makes it safe to hand to an operator.