Run Open Stage Control on the computer as well. Create a basic interface with buttons for each of the products (you can do a lot of customisation in OSC, including adding images and all sorts), for each button set the OSC address to trigger the button in companion that corresponds to the video you want to play. Launch the server, and on the tablet connect to the server through a web client. Source: about 1 year ago

First thought that popped into my head was to write a custom module in Open Stage Control that watched for that MIDI value and issued the commands you want. Source: about 1 year ago

Obligatory shout-out to Open Stage Control, which is open source and works on any browser. Source: about 1 year ago

Not only Android, but everything that has a browser: https://openstagecontrol.ammd.net/. Source: over 1 year ago

There's also Open Stage Control which looks to be pretty similar. That would let you open it as a web server on your computer and connect to it over WiFi from your phone browser. Upside is that it's free (as in price), but would take some setting up and probably a bit of know-how as far as computer networking goes. Source: about 2 years ago

I have a couple of these to add as well: VCVRack - simply one of the most mind-expanding things a synthesizer-nerd can play with. (https://vcvrack.com/) ZynthianOS - another example of a simple software solution to a problem nobody realized existed, opening the door to an absolutely astonishing array of Audio processing tools (https://zynthian.org/). - Source: Hacker News / 25 days ago

> It’s haven’t bought any Modular’s yet but I’m really looking forward to getting into other on the new year. http://cardinal.kx.studio https://vcvrack.com/ The former is libre and gratis, runs as a standalone or plugin and in the browser!! and is based on the latter. Ther former has a libre and gratis standalone version, the plugin version is non-gratis. - Source: Hacker News / 7 months ago

A music synthesizer. It's a pathway to learning electronics, music, and the nature of sound. There are cheap kits, cheap synths, lots of kinds of synths, and there are much more complicated and expensive systems you can grow into. You can get software synths also, VCV Rack is a free though complex one: https://vcvrack.com/ However I'd recommend an inexpensive hardware one with real knobs you can turn, like one... - Source: Hacker News / 9 months ago

What really opened my eyes was the Nord Micromodular; it taught me what I just described. It showed me how limited other synths were - but that limitation was a trade-off because it's much faster to make something on a fixed-structure synth than on a modular, in most cases. Nowadays, you can use https://vcvrack.com/ instead of a small limited box that needs Windows 98 to run the editor on. Source: 12 months ago

Also I would suggest the paid version of VCV rack which works as a VST too ( the free version is just stand alone ) Expecially when experimenting with modular ( believe me, it can save you a fortune whilst you learn what different modules do ) I would also recommend Omri Cohens Youtube channel for learning this too. Source: about 1 year ago