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Public domain sound effects, abstract audio waveforms, futuristic electronic beeps, retro 8-bit video game sounds, sci-fi alien ambiance, eerie atmospheric whooshes, bright piercing synth leads, dark ominous drum hits, vinyl crackle, warm analog hiss, stereo widener, close-up microphone recording, high-gain distortion, real-time audio processing, dynamic equalization, cinematic sound design.