Suspended
Suspended chords have no 3rd and either an added 4th (sus4) or added major 2nd (sus2)
Suspended chords allow you to "explore" the bass.
- That is, try making a piano rhymthm with sus2/sus4/major in the right hand, and move around the bass note to drive the progression.
- source + example
sus chords also work well as arpeggiated sequences, leveraging octaves in the bass and the 3-note sus chord in the treble.
- also works well with the 3rd added back in.
It is impossible to determine if a given sus chord is a sus2 or sus4 in isolation, since every sus chord could be either (until the root becomes unambiguous).
- ex. Gsus4 is enharmonically equivalent to Csus2