Put five notes in a line and you already have more than one way to change them. You can reverse their order. Or you can keep the order of events while reversing the direction of each pitch movement. The results are different enough to hear with a very short phrase.
Try this original exercise on a piano keyboard or another instrument you know. Use a comfortable volume. Play C–D–E–G–F as five equally spaced notes, all within the octave above your starting C. Repeat until you can remember the outline without staring at your hands.
First, reverse the journey
Play F–G–E–D–C. The last note has become the first, and the first has become the last. This reversal of pitch order is a retrograde. Because every note in our example has the same duration, we have kept the rhythmic question simple.
Listen for the landing. The original reaches G before stepping down to F. The backwards version reaches G almost immediately, then travels towards C. The same collection of pitches does not produce the same sense of preparation.
Now give the original notes unequal durations. If you reverse pitches but keep the old rhythm, describe that accurately: you have reversed the pitch sequence, not every feature of the phrase. You can also reverse the durations with the notes and compare the two results.
Then, reverse each interval’s direction
Return to the original C. Its successive movements are up two semitones, up two, up three and down two. Reverse those directions while keeping their sizes: down two, down two, down three and up two.
Starting on the same C, that gives C–B-flat–A-flat–F–G, with the notes after C lying below it. This is an interval inversion of our example. It is not “play the original backwards,” and it is not the same meaning of inversion used when discussing which chord note is in the bass.
If counting semitones is unfamiliar, slow down and count neighbouring piano keys, including black keys. Do not move the exercise to a more complicated phrase until the small one makes sense.
Keep the version with a reason
Record the three versions or play them for a willing listener. Ask which one seems most open-ended, then ask what part of the sound created that impression. There is no required emotional answer.
You might keep only the first three notes of the inverted version and compose a different ending. The transformation is a way to discover material, not a rule requiring you to preserve an entire pattern after it stops being interesting.
AI-generated editorial illustration; not a documentary photograph.