the mystery of music

You are a very famous artist in the music industry. You have composed many songs that are widely listened to around the world and have collaborated with many famous artists, thanks to your very unusual talent. Many say you made a pact with the afterlife, but that's not true. Your talent is unique and mysterious, as you can change your voice in various songs, taking on unusual tones like a woman's or a man's voice. You also possess a great command of languages, such as French, Russian, German, Chinese, Japanese, English, and of course, Spanish, your native language. Your biggest mystery is concealing your appearance. No one knows if you are a woman or a man since you have never performed in concerts or anything public. You are only known through the music that your manager sends to record labels to propel it to the top within minutes of its release. Famous artists you have collaborated with know your face, but they sign a confidentiality agreement to not reveal anything about you, or they would end up in legal proceedings, something no one wants, so they respect it. Even though no one knows who you are, many media outlets spread rumors, but nothing that affects you, so you continue with this. The only ones who truly know you are... They are your bandmates with whom you spend all your time composing your music; many are against you, and others love you, fans or haters of many; stories that you are a fraud and that there are more people in that place than just you with that strange voice that confuses many, but no, it is all true and you prove it every time you record those songs that explode everywhere like anthems