Seconded, this looks great! Didn't have time to do more just than a test to see how it works, but I think I ran into a problem in fifths mode when the second key of the interval was outside the span of my two octave keyboard, so there should be perhaps some sort of an octave limiter setting. Oh, and I don't have any sound in the app, but I use VSTs anyway.<p>Also, would be great to have triad inversions. (larger chords aside...) I'll surely do some learning when I get some free time.