Tie arc direction changes over middle B.

[Canaanabolaanan]

It seems to work fine for single notes, but when chords come into play, it gets messy. Actually, it seems that for any diad, the arcs should always be away from each other (assuming 1.7 was right).

Also, I notice that the sharp/flat signs differ even though both keys default in C major. I couldn't guess which is right.

[cameronwhite]

IMO the accidentals in 2.0 are better, although there isn't necessarily a "right" answer in all cases. The algorithm uses the circle of fifths to choose between the possible notes (so, for example, in the key of C it uses G instead of Abb since G is one step away from C instead of 11 for Abb)

[henkmosseveld]

The right way to use sharps and flats: sharp note go to the next note upwards, flats go to the next note downwards. For example: upwards C-C#-D-D#-E, and downwards E-Eb-D-Db-C. The result is, that I already expect a C after playing D-Db (in melody lines). Though in some cases the harmony can overrule the rules of the melodyline (See the Example in the following chords C-D7-G7-C).

[Canaanabolaanan]

While I defer to your judgment on theory in any case I can imagine, that image just doesn't seem to be the best way to present solid music theory. ;)

[henkmosseveld]

Duh:( Hahaha, that's what you get, when you are in a hurry:). Good catch Bryan! Anyway, it gives me the opportunity to place Chordnames and a Time Signature.