I have just deployed a new beta release of the firmware and webapp on to beta.electra.one. It is an alpha version of the upcoming v3.6. It brings a new feature that allows preset creators to use custom controls with their own methods for painting, reading the display touch and pots.
The idea has been around for quite a long time. I decided to implement just recently while I was working on presets for Kawai K5 and K5000. The E1 presets for these additive synths do not bring much extra value if user cannot see the harmonics and their levels. With the 3.6 alpha release I was able visualize the harmonics according to the settings of other parameters, ie. the custom controls were display-only:
(I guess @duster will like that)
As the next step the idea was extended with allowing the custom control callbacks to access information about the (multi) touch and pots. As the work got quite far I would like to share it with you here to gather some feedback.
There are a few presets to demonstrate the new functionality:
Simple graphics
XY Pad
The Cube LFO
It is all on beta.electra.one and you will be able to run the presets only with 3.6.0a beta firmware or later. It really is meant for testing, evaluation, and feedback. Do not start working on anything serious before it becomes part of the official public release.
Along with the addition of the vector graphics functions, I extended the E1 Lua so that the Control object can have extra attributes and methods added. Either the instances or the Control class as a whole. I will write some more info on that later. But the idea can be seen in the demo presets above. The goal was to allow encapsulation of the data within the Control object instead of excessive use of global variables.
I am still planning to add number of commonly controls to the web editor, like extra envelope types. The Custom Control is really meant for situations when specific needs need to be covered. Like the K5 harmonics, diagrams of operators, visualization of LFO data, etc. I guess you can imagine we can do a lot with this.
The documentation at Preset Lua extension | Electra One Documentation has been updated already. v3.6 functionality is marked with an info box note.
Use the highlighted link to download the beta version firmware (on beta.electra.one):
And just a small teaser for those who will not test 
This is a simple LFO that outputs two CCs according to the XY position of one of the cube’s vertices. It is just a demo, not meant for any serious use. But the fun factor of working with the graphic library is quite huge. It also can be a good stuff for learning Lua. All the boring heavy lifting is done by the controller for you, you can just focus on the graphics.
