About this blogger:
A theorist, organist, and conductor, Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004), and did graduate work in Musicology. He serves as choirmaster for the new FSSP parish in Los Angeles, where he resides with his wife and children.
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“The sun’s disc did not remain immobile. This was not the sparkling of a heavenly body, for it spun round on itself in a mad whirl, when suddenly a clamor was heard from all the people. The sun, whirling, seemed to loosen itself from the firmament and advance threateningly upon the earth as if to crush us with its huge fiery weight. The sensation during those moments was terrible.”
— Dr. Almeida Garrett, professor of natural sciences at the University of Coimbra (1917)

Psalm Tones Beyond A Doubt
published 30 May 2017 by Jeff Ostrowski

SALM TONES can sometimes be tricky. Mode VIII is much easier than, for example, Mode III—but even Mode VIII can be ticklish. One reason is that several are related to each other, such as the example I gave of 1 and 6 in a recent post. Here’s an incredibly useful PDF I just came across from 1949:

    * *  PDF Download • The Eight Gregorian Psalm Tones (29 pages)

It shows all the “difficult cases” and their solutions:

157  The Eight Gregorian Psalm Tones

This chart is also nice:

    * *  PDF Chart • The Eight Gregorian Psalm Tones