Sixth

• Big sixth - an interval of six steps and four and a half tones , denoted by b. 6

• Small sixth - an interval of six degrees and four tones, denoted by m. 6 .

• Increased sixth - an interval of six degrees and 5 tones, denoted by uv. 6 , enharmonically equal to a small septim .

Increased sexta under construction:

• on lower II in major and harmonic minor , resolves to pure octave on the first degree
• on IV (with the participation of II increased) in major and IV reduced in minor , resolves to a clean octave at level III
• on the sixth harmonic in major and sixth in minor, resolves to a clean octave at the fifth step.

• Reduced sixth - an interval of six steps and three and a half tones, denoted by the mind. 6 , enharmonically equal to a pure quinte . It is built on an IV elevated step in a major and a minor (in both cases with the participation of a lower II) and is allowed in a clean quart on the V step.

• Small sixth:

• Big sex:

• Sekstakkord