If you are looking for actual audio files of vocals from the past:
: You can upload standard formats like MP3, WAV, and FLAC . Most tools process the audio in under a minute, allowing you to download the isolated vocals directly to your device.
: Tools like LALAL.AI and Vocal Remover use AI to deconstruct a mixed MP3 file into separate "stems": the vocal track (acapella) and the instrumental track.
: Producers often use these to find "Vocals From Yesterday"—soulful, jazz, or classic pop vocals—to give a modern track a nostalgic feel.