인스티즈앱 막귀 테스트 했는데 결과를 못알아먹겠음ㅠㅠ
Despite its bad rap, the MP3 is actually a remarkable feat of engineering, and pretty good at filtering out mostly the sounds you can’t hear. Depending on the quality of your headphones, you might be able to distinguish between the two MP3s, but you’re unlikely to do better without an amplifier or a digital audio converter.