Knowledge Base

Requires Ubuntu 20.04.

Minimum Requirements: resolution of 1920x1080 for your primary screen, and graphics card with drivers able to run version 4 of OpenGL shaders and at least 4GB video ram. Suggest installing the latest graphic drivers and recommend the system uses an SSD Drive.

You will need FFmpeg installed. sudo apt update;  sudo apt-get install ffmpeg;

If you have trouble importing a file (e.g. mp4), you could review:
which amounts to trying this: sudo apt-get install ubuntu-restricted-extras


There is NO telemetry in this app, you don't need an internet connection to use it. If you have any issues you will need to report them.

If you wish to report an issue or ask a question, please use the support forums here or email

I hope you will get as much fun playing with it as I do.

Designed and Developed by: John Day

Technologies: C++, OpenGL

Tools used: Programming IDE CodeBlocks, Image editor Gimp, 3D Stuff Blender

Some archive screenshots and

music I listen to while coding MixCloud and

music I make when I need a break from coding SoundCloud

VIDIFOLD Revision Notes

A list of all the notes from all versions is provided below.


Playback head indicator no longer shown on empty slots when in Alt Empty mode
Now saving non-enabled fx in Aux slots, as these are used for cloning in some workflows
Now allowing source plugins in aux slots
Output FX Stack now saved with startup patch
Fixed slot snapshot saving, stopped working in 0.28.4


Fixed alpha in Zoom plugin
Fixed bug introduced in last release when adding to library


removed legacy "check for updates" function
removed empty bus menu popup
fixed bus driver panel autoselect bug
added "Alt Empty slots" option, shows and saves empty slot setups
LEFTSHIFT + aux slot now triggers stop, same as rack slots
Added a "eject aux patch" button


fixed seg fault when cloning a plugins only slot to workbench
moved slot menu button and introduced a separate slot eject button
removed library sync system, this was a bit fragile and wont play nice with new library options
- will add a simpler backup/sync option in the future, possibly based on some type of import/export
- prep work on ability to spread library across multiple disks/folders (hidden)


Color coded the driver panels to match slot
Fixed segfault when enabling APC
Improved qfx autoselect algo
Fixed crash when midi triggered aux slot
Some bug chasing in APC40 code
Increased fxstack hotslots to 4 (F9-F12)
Re-instated close button on plugins and moved menu to plugin sidebar
Updated pending slot speed changes
- on retrigger and if already playing and in toggle mode no longer preforms a retrigger
- or on next loop/bounce (not to be confused with next trigger position)
and as usual some theme tweaks