BW and Dave,
I was busy writing when the internet connection died.
And maybe that's a good thing, because Dave explained it far more succinctly than the explanation i was struggling with.
So the basics.
From the top down, and assume that middle C is C4.
Soprano
Alto
Tenor
Bass
4 parts, and the building blocks for harmony, and part writing.
For the following assume one semibreve/wholenote per bar.
First chord C major consisting of (bottom up) : Bass voice C3. Tenor Voice G3.
Alto voice E4. Soprano voice G4.
Next bar.
G major chord consisting of (bottom up) : Bass voice G3. Tenor voice B3. Alto Voice D4. Soprano Voice G4.
In this basic example you can see Dave's point of contrary motion.
The bass voice goes up from C3 to G3. The Alto voice goes down from E4 to D4.
This is considered a strong motion. Note the soprano voice can stay the same as G4 is common to both chords. (This a common trick of Beethoven's, and if you play this cadence with strings, you'll hear the strength of leaving the soprano voice as is. Use the example of the introduction of Ludwig's 7th, and you'll hear quite clearly the common note in the upper voices (either Alto or Soprano) sustained in pitch and voice for more than one bar.)
I very respectfully suggest BW, that you invest in two books. Harmony and Counterpoint. (A third book to add is part writing.)
These will, if you decide to purchase, become important reference books on your musical journey, and will prove invaluable time after time.
Dave has also pointed you in the right direction for guidance and study. Whatever Bach wrote, he understood the construction of 4 part writing, (and invention) and listening and studying to the Chorales will prove invaluable.
Good luck and my regards,
Alex.
I was busy writing when the internet connection died.
And maybe that's a good thing, because Dave explained it far more succinctly than the explanation i was struggling with.
So the basics.
From the top down, and assume that middle C is C4.
Soprano
Alto
Tenor
Bass
4 parts, and the building blocks for harmony, and part writing.
For the following assume one semibreve/wholenote per bar.
First chord C major consisting of (bottom up) : Bass voice C3. Tenor Voice G3.
Alto voice E4. Soprano voice G4.
Next bar.
G major chord consisting of (bottom up) : Bass voice G3. Tenor voice B3. Alto Voice D4. Soprano Voice G4.
In this basic example you can see Dave's point of contrary motion.
The bass voice goes up from C3 to G3. The Alto voice goes down from E4 to D4.
This is considered a strong motion. Note the soprano voice can stay the same as G4 is common to both chords. (This a common trick of Beethoven's, and if you play this cadence with strings, you'll hear the strength of leaving the soprano voice as is. Use the example of the introduction of Ludwig's 7th, and you'll hear quite clearly the common note in the upper voices (either Alto or Soprano) sustained in pitch and voice for more than one bar.)
I very respectfully suggest BW, that you invest in two books. Harmony and Counterpoint. (A third book to add is part writing.)
These will, if you decide to purchase, become important reference books on your musical journey, and will prove invaluable time after time.
Dave has also pointed you in the right direction for guidance and study. Whatever Bach wrote, he understood the construction of 4 part writing, (and invention) and listening and studying to the Chorales will prove invaluable.
Good luck and my regards,
Alex.