1. Pitch detection
Using a standard tuner to inspect each drum individually, the deviation between its actual pitch and the nominal pitch should be within ±5 cents. Check the accuracy of the interval relationships, such as major thirds, perfect fourths, perfect fifths, etc., to ensure harmonic consistency of the scale. In a constant temperature and humidity environment, the pitch should remain stable after continuous striking, with no significant drift.
II. Timbre and dynamics
Strike the center of the drumhead one by one, ensuring that each drum produces a clear, full tone with sufficient resonance, without any noticeable noise or "muffled" feeling. The tone transitions of the five drums should be natural, without any noticeable discontinuity. Test the linearity of tone changes under different levels of force. Use a rolling stroke to test whether the dynamic response is sensitive and uniform.
III. Hand feel and response
Strike with standard force to feel whether the drumhead rebounds evenly and sensitively, without any noticeable delay. Check the drum cavity for any abnormal vibrations. When playing quickly, ensure the drum stand is stable and does not wobble. The overall playing experience should be comfortable and easy to control.
IV. Process and Supporting Facilities
Inspect the drum cavity for cracks and deformation, the drumhead for flatness and flawlessness, and the metal parts for rust. Ensure that accessories (drumsticks, tuning tools, drum stands, and bags) are complete, intact, and compatible. Factory inspection reports, quality assurance cards, user manuals, and other documents should be provided. Packaging should meet transportation safety requirements.
