this is great news to my ears: The guy that crafted Helm, Matt Tytel, has just made another brilliant synth plugin.
It has got MPE and microtonal stuff build in and is able to talk in russian English as well if you like it to (https://youtu.be/C4SxSWigxI4).
Good news: Just as with Helm, there is any plugin format available one would want these days, LV2 as well. Running on Linux, Windows, Mac. No AAX plugin version by the way, I have to contain myself from mean jokes now
Bad news (yet): There is no ARM build afaiks (yet?). There is no openly available source either (yet?).
The latter is understandable to some point since he is starting to sell it. But I hope maybe at some point in the future he will open it to the public. In fact someone already asked about open source in the youtube comment section where Matt Tytel keeps answering questions, but no answer on this yet.
Still hoping though, especially since people in the comments report surprisingly low cpu cost. I guess the first path would be asking for an ARM build, so we could maybe integrate it in a way comparable to the pianoteq situation.