Here are some possibilities that might be related to what you're looking for:
1. Melodies built through subtraction:
* Ostinato variations: An ostinato is a repeating musical phrase. You can create variations by removing notes from the ostinato, creating a subtractive effect.
* Rhythmic reduction: This involves taking a complex rhythm and simplifying it by removing notes or changing their duration.
* "Subtractive" improvisation: Some improvisers might start with a broad idea and then "subtract" elements as they play, creating a more focused and minimal melody.
2. Concepts related to subtraction in music:
* "Subtractive synthesis": This is a sound design technique used in electronic music where you start with a complex sound and then remove frequencies to shape the tone.
* "Subtractive harmony": This refers to the process of building chords by removing notes from a larger, existing chord.
3. "Subtractive melody" as a metaphor:
* Some composers or theorists might use the term metaphorically to describe a melody that feels like it's being "whittled down" or simplified over time.
To understand what you're looking for, please provide more context:
* What musical piece or style are you thinking about?
* Can you describe the musical effect you're trying to understand?
* Are there any specific examples you can give?
With more information, I can provide a more accurate and helpful explanation.