紧张琵琶氛围

Loop tense pipa ambient base: solo 4-string Chinese pipa chaotic muted left-bridge sweep, atonal frantic rustle, continuous layer; followed by four progressive heavy hit cues on downbeats: 1.deep low muted pipa strike, 2.loud full-string dissonant sweep, 3.tearing rough outer-bridge scrape, 4.explosive max-power pipa strike with broken texture, all dry raw audio, no reverb, no western string instruments