Archytas chords

Archytas chords are essentially tempered chords tempered by the archytas comma, 64/63.

These include the following palindromic triad in the 7-odd-limit:

• 1-4/3-7/4 with steps 4/3-4/3-8/7.

as well as the following palindromic tetrad:

• 1-4/3-3/2-7/4 with steps 4/3-8/7-7/6-8/7.

In the 9-odd-limit, we have an additional palindromic pentad:

• 1-7/6-4/3-3/2-7/4 with steps 7/6-8/7-8/7-7/6-8/7.