How To Transpose, Modulate and Memorize Music

LONDON, ENGLAND - JUNE 11:  Schoolgirls Kaila ...Image by Getty Images via Daylife

Have you ever tried to memorize a song? Have you ever experienced the frustration of finding that no matter how many times you played the melody, it still eluded you? One of the best ways to memorize involves transposition, or "moving" a melody from one key to the other. When you transpose, even though the notes change, the distance between them (the intervals) remain the same. First, let's look at one of the easier transpositions- up a half step- and next we'll use this as an aid in memorizing.

There are different ways to transpose. Following is one of the simplest involving cooperation between the eye and ear. This is what I share with my piano students:

1. Select a melody and get to know it by playing it a few times.
2. Then, to transpose it up a half step, play the melody while visualizing sharps being added to all the notes. For example, C would become C#. If a note already has a sharp, make it double sharp. Don't forget to change the
accidentals in the key signature, too.

Let's try this out on a song, "I've Got The Whole World on a String". Work slowly- one phrase at a time- while listening to what you're playing, letting your ear sometimes take the lead.

Example: single right hand melody notes

C, F, A, D, C, Eb, D, C, B, F, B, A, G... becomes

C#, F#, A#, D#, C#, E, D#, C#, B, F#, B, A#, G#


I found this great article called Transposition and Modulation: How To Transpose To a Different Key & Modulate Between Keys by Duane Shinn.

http://www.artiiclesauce.com/Article?Transposition-and-Modulation--How-To-Transpose-To-a-Different-Key---Modulate-Between_Keys/24805



"How do transposition and modulation relate? Are they the same? Let's take a look at both of them and see what makes them tick.

I am sure that you have had the experience sometime in your piano-playing life when someone asks you to play a song -- but in a different key than in which it is written. It might be a singer wanting you to lower the song a step so he/she doesn't screech. It might be a song leader wanting you to play a song in a more comfortable keys for a congregation or group. It might be a trumpet player looking over your shoulder and wanting to play along with you -- but when he/she plays the same note you are playing, it sure doesn't sound the same!

So....it's your job, as pianist, to get that song moved to a different key. That's transposition -- playing or writing a song in a different key than in which it was originally written.

Modulation is similar but different -- modulation means the process of getting from the old key to the new key. In other words, if I'm playing in the key of C, and then want to play in the key of Eb, I have to learn to modulate -- move smoothly from one key to another without being too abrupt and jarring."



Duane goes on to say that:

"There are basically 3 ways to transpose:

1. by intervals

2. by scale degrees

3. by solfege -- the moveable "do" system.

But since solfege applies mostly to singers, we will ignore that possibility and just take up the first two:

1. Intervals: If the new key is an interval of a minor 3rd above the old key, then all notes in the song will also be an interval of a minor 3rd higher. In other words, if you are transposing from the key of C to the key of Eb, which is a minor 3rd higher (or major 6th lower -- whichever way you want to look at it), then all melody notes will also be a minor 3rd higher:

"G" in the key of C would become "Bb" in the key of Eb. "E" in the key of C would become ":G" in the new key of Eb. "A" would become "C", "B" would become "D", and so on. All chords would also move a minor 3rd higher. The "C chord" would become the "Eb chord", the "F chord" would become the "Ab chord", and so on.

2. Scale degrees: Each key you play in has it's own scale degrees. In the key of C the scale degrees are: C=1, D=2, E=3, F=4, G=5, A=6, B=7, C=8. In the key of Eb, however, Eb=1, F=2, G=3, Ab=4, Bb=5, C=6, D=7, Eb=8. So if I want to transpose Silent Night, for example, from the key of C to the key of Eb, I need to notice what scale degrees I am using in the key of C, and then use those same scale degrees in the key of Eb. For example, Silent Night starts on the 5th degree of the scale, goes up to the 6th, back to the 5th, then down to the 3rd. In the key of C that is: G-A-G-E. But in the key of Eb it is Bb-C-Bb-G. Why? Because the scale degrees 5-6-5-3 are constant -- we just need to apply them in each key. What about chords? Same idea. If the chord progression on Silent Night is the I chord followed by the V chord, followed by the I chord, followed by the IV chord, etc. -- then in the key of C that means C-G-C-F-etc., but in the key of Eb it means Eb-Bb-Eb-Ab-etc.

Modulation means getting between keys, so let's say you are playing in the key of C, but you want to get to the key of Eb smoothly, without jarring the nerves of the listeners. There are lots of ways to do it, but the main point is that you have to get to the V7 chord of the new key. So from the key of C to the key of Eb, that means getting to Bb7. How do we do that smoothly? We look for chords with common notes. Since the V of the V of the new key would be Fm7, we have C as a common note. So we hold the C in the C chord, and move the rest of the C chord to Fm7, then Bb7, then Eb, and presto -- we are there!"

Transposition means to play a song in a different key. Over the years of having the experience to play with various worship teams, I've learned that tenor worship leaders usually select songs in their voice range that they're comfortable singing in. So we would play lots of songs in the Key of E or G. Remember that modulation is the process of getting from key to key. So, when playing some of Israel Houghton's songs, as a team we would modulate several times in just that one song. It produces a very effective, professional sound.

Thanks for taking the time to read this music theory lesson. Learn to play one song in all twelve keys... have fun learning!

~ LadyD



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