[Piano Tutorial] 7th Chords: what are they and how to play them with symbols (한글자막)
Channel: Piano Musium
Date: 14/12/2018

No.1  Maj7 (Major 7th): Major triad + Major 7th
No.2  7 (Dominant 7th):  Major triad + minor 7th 
No.3  min7 (minnor 7th): minor triad +  minor 7th
No.4  min/Maj7 (minor/Major 7th): minor triad + Major 7th