Nosey feckerz everywhere!
All you can do is use a pitch correction vst! or what ever Daw you use should have pitch up or down [cents] But sometimes music sounds ok detuned!
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i use hirens & Malwarebytes for quick scan or full! G Data takes too long! & it detects Keygens as Trojans
https://audiomodern.com/shop/plugins/chordjam/ https://www.chordprism.com/
Defo harsh high frequencies sounds muddy,just needs remixing:wink:
Free https://plugins4free.com/plugin/949/
Also have a look on Bandcamp here's a few https://bandcamp.com/search?q=DEFECTED+ACAPELLAS&item_type=
Separate names with a comma.