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What mode or scale/tonality is used in this piece? What method should one use in order to answer this question? Is it modal or tonal?

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    Why don’t you show the whole song? We should know the final chord. – Albrecht Hügli Apr 10 '20 at 13:48
  • Good call! I see a double bar, but not a bold final bar. – Michael Curtis Apr 10 '20 at 13:56
  • And the lyrics don’t fit in the 2 lines. I thought OP is cheating. That’s why I say it can be F major. What we have here is maybe a semi close on the dominant. But I can see the 3 of nr. 309 at the top next page ... – Albrecht Hügli Apr 10 '20 at 15:00
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    I vote for reopen this question as it is quite differencing and not just saying what mode is this ? Do we have to change the title? – Albrecht Hügli Apr 10 '20 at 18:00
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Given a key sig. of one flat, that says it uses the notes from the F major scale. No accidentals, so no distractions.

It starts and finishes on a C major tonality, so the fifth of F is where we find that. The fifth mode of key F is Mixolydian, so it's in C Mixolydian.

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  • Hymns are normally classed modally according to the melody, not the harmony. So if that's the final cadence, this would be Dorian with the final chord being IV rather than I. – phoog Apr 11 '20 at 18:05
  • @phoog - that probably isn't the final cadence, so if it was Dorian, from what you say, it's G Dorian, and that would make it i instead of I, do you agree? – Tim Apr 11 '20 at 18:15
  • I reckon it is the final cadence. Omkväde means refrain; the refrain is usually sung after every verse, therefore last. – phoog Apr 11 '20 at 19:05
  • ...and in my previous comment I forgot to note that C major is IV of G Dorian, not i. – phoog Apr 12 '20 at 4:39
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We have 3 clues:

  1. The signatur

  2. The final chord

  3. The tenor (repercussio tone)

What tells the signature?

Mind that the last flat of the key signature is always Fa. As we have only 1 flat: Bb = Fa

C = So, F = Do, G = Re etc.

If the final chord is F and also the melody closes on F this song would be in F major (but exceptional beginning with a dominant chord.)

The modes are built on the scales do re mi fa so la. Each of these tones is the root tone of the specific modes.

  • Re = dorian
  • Mi = phrygian
  • Fa = lydian
  • So = mixolydian
  • etc

(Look up church modes)

The tune of this begins and ends on re and ends on Re (as far we can see, because you don’t show us the final chord.)

Re would be dorian, if we had only the melody and the finalis is G we could say: the tune is dorian.

The repercussion tone would be D but it doesn’t look like this.

And the harmonization is like Tim says built on C, this would be mixolydian. In this case we should expect that the finalis is C.

Edit:

Actually it looks and sounds rather as a responsorial prayer between a song or part of the sermon and not like a song itself, because of the feeling of the dominant chord (C) at the beginning, the first phrase ending in F (first line) and the dominant C (end 2nd line).

Probably someone will say this exactly is the effect of the mixolydian mode.

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  • It thought it was a Dorian melody as A is the tenor. Mixolydian does not have A as the tenor. How then is it mixolydian? Maybe it is not that Gregorian. It doesn't sound like a Gregorian melody. It sounds more major than minor. – user20754 Apr 10 '20 at 13:50
  • @Hank what do you mean "A is the tenor"? The tenor is the part above the bass, in this case it's centered around middle C. – Michael Curtis Apr 10 '20 at 14:21
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    The tenor in chant is the repercussio tone: en.wikipedia.org/wiki/Repercussion_(singing) – Albrecht Hügli Apr 10 '20 at 14:57
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    @Tim: If we look in the Soprano as the cantus firmus, the tenor (repercussio) of A would be repeated several times. But if the c.f, is in the 3rd voice (Tenor) this c.f. would be a little boring, but then it would make even more sense to say this is mixolydian. – Albrecht Hügli Apr 10 '20 at 15:26
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    @Tim "tenor" is sometimes used as a synonym for "dominant" in chant. The dominant is the note around which the melody spends most of its time. The other important note in ecclesiastical modal theory is the final, which in the case of Dorian is D. – phoog Apr 11 '20 at 18:08
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Ecclesiastical tunes are typically categorized by the melodic mode. Since the music that is shown is the refrain of a hymn or metrical psalm, I presume that it is sung last and that G is the final note. Assuming a final of G, the piece is in G Dorian. We can rule out the other three ecclesiastical modes because Lydian and Mixolydian have a B natural, while Phyrigian has A flat.

It is not unusual for the melodic final to be harmonized as the third or fifth of the final chord. Examples of this may be found in the music of JS Bach, although his style is not generally diatonic as is this harmonization, which harks back to the metrical psalm harmonizations of the late renaissance.

The examples that are most noticeable are those in the Phrygian mode, because it's not possible to have a V-i cadence in the Phrygian mode if the penultimate note of the melody is the second scale degree because the second scale degree is a diminished fifth above the fifth scale degree.

The cadential formula in this melody is A-F-G, all whole steps. To make a common-practice harmonization with an authentic cadence (i.e., a penultimate D major chord), it would be necessary to alter the melody, robbing it of its Dorian character. A standard plagal cadence would have a penultimate C major chord, and neither A nor F is present in that chord. This helps to explain the decision to cadence on C.

There is a case to be made, as others have done, that the piece is harmonically in C Mixolydian, but I disagree on melodic grounds. I would analyze it as G Dorian, ending on a IV chord.

(While a single flat in the key signature and a final of G would normally mean that the piece is in G Dorian, B is frequently flatted in Dorian mode, and this is sometimes reflected in the key signature. That is less likely in a modern edition, but if the verse of this piece ends on D then the piece could be in D Dorian.)

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