I’ve been recently trying to make a multiband plugin as a personal project, but I’ve been having issues splitting my input signal into 3 bands. I’ve tried using a custom Biquad filter a friend made which resulted in some weird phase issues. I’ve also been looking into the Linkwitz-Riley filter class but I’m not certain about how to implement it or what the best way to implement it is for efficiency / accuracy.
Any help would be awesome for this, I’ve watched through a lot of youtube tutorials already but I never really understood them and always just found myself copying the code from them.