I love the power and sound of this synth, and I find it much more usable than both the synthmasters, which I could never warm up to. It’s mostly intuitive, and the developer is clearly committed to the product and listening to users in forums. However, a few things are odd to me:1. There’s no button for filter key follow! At least 1/2 and full are pretty standard. Yes, you can set it up in the matrix, but it’s something that should have a button like every other synth, and there’s room for it in the ui.2. The curve of the envelopes is odd, with the release especially being weird. It ends pretty abruptly, which I’ve never heard any other synth do. Again, there are other envelop options, but I don’t want to use the curve envelope for something simple if I don’t have to.3. I get crashes with one instance in AUM using the unison function on an m1 iPad Pro. Seems like a bug? It created crazy full-volume white noise that hurt my bands ears when it crashed too.4. I find the matrix extremely fiddly with the min and max knobs. I wish there was an easy way to only have amount to speed things up.

ButterSynth allows you to program from several different ideas. It is a deep, great sounding synth that can be a sounding as you like or weird and exotic.This is why I am so fond of this synthesizer. When programming there are many approaches that can be same sounding, but typically offer timbres that are somewhat similar and yet very different sounding until you realize the base of the sound starts from similar areas in the synth well producing different concepts taken from the same beginning.Personally, I’m not a big fan of the interface. It’s set up in a way that wastes a lot of screen space. And don’t necessarily come from the same style, which can be a little bit disconcerting and for me at least takes a little bit more time for me to figure out where I wanna go next. However, where I wanna go often ends up someplace different and interesting so in that respect as a user you end up in different places, different representations, and places you didn’t expect to find interesting but are. For that reason, I love this synth and find myself using it way more than I expect. Because of this, it does have a learning curve. I do hope that they approach the graphical user interface because I think that underneath this particular UI there is something exceptional waiting to occur. But if it never changes, there’s so much you can do with ButterSynth and I find myself drawn to its sound no matter that sometimes I spend more time than I would like trying to navigate features. The unexpected sometimes yields results I would personally never think of and that’s great..

The iPad version of this app appears to be working quite well, in the iPhone version though, when I use the arpeggiator/sequencer the app crashes when I hit play, when running in standalone on iPhone, no keyboard appears on the UI, so as of now there is no way to really use it on iPhone, except when running in an auv3 host, then the keyboard appears and it works

Likely to be a top iPad synth for years to come. Finally feel like a Serum alternative is available on the iPad. Loads of modulation capabilities (although via static table and no animations depicting modulation like serum). But nitpicking aside, a wholesome modulation control matrix, sequencer, arp section to go with the multiple oscillator types that can work together for infinite sound capabilities. Wavetables and FM capabilities to match any top synth out there with a good array of effects on one of the tabs. It’s going to be my go to sound generation device to use with my polyend tracker and octatrack for a while. Some of the presets are pure magic in terms of sonic range -growls, trancy sounds or even percussions.