[shameless plug] I built http://lightnote.co for exactly this. Starting from basic sound waves, it teaches music theory while skipping all of the technical notation. It definitely doesn't go as deep as this post, but I don't think that's essential to getting started. - Source: Hacker News / almost 3 years ago

My favorite course is https://lightnote.co due to how the information is structured (it's not free though). Source: about 3 years ago

But if you are using certain types of dynamic instruments you may want to look for one of these that have extra expression capabilities: https://roli.com/products/seaboard/rise2. But it's not going to feel the same, and I can't personally tell you how they are, just if I was going to buy another keyboard it's on my list. Source: over 1 year ago

Seaboard RISE 2 is exclusively available to order via roli.com. It is only available in the US, Canada, UK and Europe. Source: over 1 year ago

Honestly you'll get the most control and best sound with MPE enabled devices like the rolli seaboard for virtual strings, horns, or synths Https://roli.com/products/seaboard. Source: almost 3 years ago

Roli Seaboard is fairly flat and at least partially touch sensitive. Not cheap, but might be an option. Demo. Source: almost 3 years ago

Really didn’t use the faders that much while laying down keys. I add most of my effects and expressions in post (velocity and phasers etc). I use Logic but I’m sure your workflow and approach is different regardless of the DAW in question. I do use the hell out of the faders and knobs on my MPD32 drum pad when I DJ, the program I use is Traktor by Native Instruments. It really depends on your application, live... Source: about 3 years ago