Quick answer: The parentheses shows the tensions which are added to the chord.
Naming convention for chordsThere exist many chord naming conventions out there. In Liquid Notes we're trying to make reading of chord names as simple as possible for you with the following system:
Base chord name (highest tension)The chord names can be seen on top of each chord box or in the substitution drop-downs:
A chord name consists of the base pitch and the chord quality: m, maj, dim, aug, sus, and if applicable, if it's a 7 chord or not. (Note that for simple major triads, maj is omitted).
The number in parentheses indicates the highest tension which will be used when reharmonizing the chord with the selected substitution.
Altered tensions have a "b" or a "#" symbol before them: a "b" meaning that the tension is flattened by a halftone, a "#" meaning that it's one halftone sharp.