Violin, being a "natural" acoustic sound, is less tolerant to tonal modification than
other "electronic" sounds. You've written an arrangement that is pretty full-on
frequency-wise for the whole piece, and trying to squeeze a violin in there is going to be
Case in point, right now it sounds more like an oboe.
the 1KHz region less, and increase the 5-12KHz region. You will probably need to reduce
the level or the HF content of some of your other synths to leave room.