Hello. A super interesting topic that could go a long way.... First of all, let me say that your short piece sounds very beautiful and I love it. I would only change one thing, which I will comment on later. I’m definitely going to say it here: I consider myself quite deeply involved in these matters of modality; in fact, my own curiosity led me to write a mini-manual where I explain how to develop musical systems from a scale-mode (any of the hundreds out there). The first thing to point out is that I think it’s a mistake to compare modal systems with tonal ones (and these with atonal ones). We need to forget about voice leading, 'forbidden' parallels, etc.... Modal music predates tonal music by more than a thousand years, and it didn't need any comparison. It must be understood as a horizontal, melodic system where there are no notes to avoid, and where certain colors (characteristic notes of the mode) are highlighted. The fact that we use chords in modal harmony today is a much later 'construct' in which the concept of the triad-chord is applied to the vertical coincidence of melodic lines in modal music. That is how harmony was born... From our perspective, since we are already familiar with functional-tonal harmony (which has thoroughly saturated our brains), we can approach a composition from an extremely wide spectrum. You can be purely modal, purely tonal, or a varying mix of both. Anything goes. In your composition, and based on your comments, one can sense a hesitation that comes and goes, which is more conceptual than musical, since the piece is completely valid and effective. But let me comment: the beginning establishes a C-G drone... typical modal style. It doesn't matter that you haven't introduced the third. The very moment the first Db note sounds on the violin, you are defining some mode of C Phrygian. In fact, it is a note that is heard at many points. If you were strictly following C Phrygian, the notes would be C, Db, Eb, F, G, Ab, Bb.... However, in measure 4, we see an E natural in the bass, then an F#... These can be interpreted as approaches to the following notes they resolve to... A typical tonal concept. In tonal music, notes resolve; in modal music, they don't—they are there to provide color. You want to use notes outside a scale-mode? There is no problem at all. It's just like using chromatic notes in a tonal composition. The problem is that if you want to maintain the color, the specific flavor of a mode, you have to be careful not to use tonal-functional resources that easily destroy that 'modal framework'. And that is what happens at the end of the composition, where there is a ii - V - I pattern ending in C major, which, for me, cancels out everything that came before. I insist that one can do whatever they want when composing. But our ears are so contaminated by tonal music that this progression ending in a perfect cadence G - C.... takes you right back to any period of the common practice. Especially the B-C..... That sounds like leading tone-tonic anywhere. But like I said: very beautiful music.