The Duff Clearing Process relies on the player’s ability to detect subtle inconsistencies in pitch, sustain, and decay, all of which are strongly influenced by the type of mallet used during testing.
Just as a microscope’s lens defines what details can be seen, a mallet defines what modes you excite and how clearly you hear them.
Hard Mallets: Ideal for Diagnostics
- Best for initial clearing and modal detection
- Emphasize high partials and expose modal misalignments
- Reveal beating, fuzz, or drift during the sustain
- Help distinguish whether a mode is split, collapsed, or unclear
A harder stick reveals the drum’s faults, like turning on the lights.
Use hard mallets when you:
- Diagnose degeneracy issues (e.g., wandering sustain)
- Test across Duff’s Primary and Secondary Channels
- Work with microadjustments in higher modes
Soft Mallets: Best for Confirmation, Not Diagnosis
- Mask higher partials, making the tone feel “rounder”
- May conceal beating or modal interference
- Useful once the drum is mostly cleared, to confirm how it will sound in context
Think of soft mallets as a performance simulation tool, not a diagnostic probe.
Practical Advice
|
Use Case |
Mallet Type |
Why |
|
Diagnostic strokes (soft & loud) |
Hard |
Clear mode excitation and decay observation |
|
Identifying fuzz in sustain |
Hard or Medium-Hard |
Reveals partials that drift or beat |
|
Final confirmation of tone |
Soft |
Simulates concert conditions |
Final Note
Mallet choice isn’t just about comfort, it’s about what modes you hear. To properly apply Duff’s system, your mallet must reveal, not conceal. Start with harder mallets to uncover issues. Then soften your approach once clarity is achieved.