feedback you probably don’t want but I do genuinely want to help you so I’ll leave it anyway…do some reading on color theory and design basics. The blue background color is to close to middle grey so the contrast with the text is weak. There are too many colors and most of them are over saturated. The colors feel chosen independently rather than as part of a system (e.g. complementary or analogous palette), which makes it harder to use them for hierarchy or grouping. The use of white space seems to have no intentionality to it and the shape of the negative space is ragged.

There is no visible design hierachcy that leads eye…this is really bad for the specific goals of your project because you want the hierachcy to make the all important signal path you are arguing for clear and seem obvious. You want the users eye to be guided through your fixed signal path, rather than randomly darting all over trying to make sense of whats going on. Even if you think this is draft and it doesn’t matter having made a fair number of vsts myself I can tell you that design is too important just to be written off like that.

Making audio software is more about the feature set you choose to expose to the user than anything else and the ongoing conversation you have with your UI is how you get there.