The Duff Clearing Process hinges on more than pitch, it’s also about how the drum evolves over time. While Mode (1,1) typically dominates the initial attack, other modes, especially higher-order or complementary ones, emerge during sustain and decay.
This temporal unfolding means that tuning must consider:
- Attack behavior (initial pitch clarity)
- Sustain consistency (lack of beating or drift)
- Decay integrity (no fuzz or modulation)
Higher preferred modes like (2,1), (3,1) or (4,1) often reveal themselves only after the drum is struck forcefully. If these are out of alignment, the decay can sound distorted, even if the attack is clean.
Clearing isn’t just about the beginning of the note, it’s about what the drum decides to do after you let go.
Practical Tip: Use a combination of soft and loud diagnostic strokes to expose the full modal evolution. Don’t judge tuning solely on attack pitch, listen through the entire life of the sound.