* The label "Rising octave" on the octave-up button doesn't make sense. Maybe you meant "Higher octave", assuming the "Lower" in the "Lower octave" button is the adjective form of "lower". If "Lower" is acting as a verb, however, then "Raise octave" would be consistent, but I don't think it sounds very natural. "Octave up" and "Octave down" might be more natural based on my recollection of music software and hardware I've used.
* As another poster noted, the (FM?) synthesizer is clipping badly when it plays chords. It's noticeable on basic 3-note triads, but it's much worse on chords with many extension tones, like a C13.
* The label "Rising octave" on the octave-up button doesn't make sense. Maybe you meant "Higher octave", assuming the "Lower" in the "Lower octave" button is the adjective form of "lower". If "Lower" is acting as a verb, however, then "Raise octave" would be consistent, but I don't think it sounds very natural. "Octave up" and "Octave down" might be more natural based on my recollection of music software and hardware I've used.
* As another poster noted, the (FM?) synthesizer is clipping badly when it plays chords. It's noticeable on basic 3-note triads, but it's much worse on chords with many extension tones, like a C13.
Thanks for sharing.