Sounds became richer and more varied, allowing for more realistic metallic tones.
Modern sound design often layers high-frequency "sparkle" sounds with 8-bit, nostalgic sounds to create a more satisfying, high-fidelity experience. video_game_coin_beep_sound_effect
Higher-pitched sounds are generally perceived as positive, signaling a "win" or positive reinforcement, similar to receiving money. Sounds became richer and more varied, allowing for