[pcf]

Did you use a FLAC/WAV file? That should yield the best results.

(Only asking because you linked to YouTube, and I'm not sure if you used the YouTube audio for your source.)

[thisiswater]

Perhaps you're right, I'd have to check.

I typed the song in the search and pressed the first likely result, which is the youtube video I linked. Using the software as intended I believe.

[marssaxman]

YouTube audio is optimized for bit rate, not quality (128K MP3). You will get better results with a higher-bitrate MP3 (320K would be good), better still with an uncompressed format like FLAC or WAV.

[BitPirate]

Makes sense. MP3 tries to compress without loosing information in the hearable spectrum of a human but that information can still be processed by algorithms.

[NonNefarious]

I can't find any way to do this.