Although errors are unlikely for Upload File functionality it can happen. The most likely reason is the file is too large (significantly over 100mb) or the file format is not one of the following: wav, mp3, ogg, m4a, wma, flac.
Please ensure your song is not too long - roughly over 10 mins. For 4+ instrument split the song duration limit is much shorter of 8 mins.
Please also check your connection to the internet is fine.
The best quality output is going to be from .wav or .flac since these audio files don't reduce the sound quality (unlike mp3). Please be aware some songs will work alot better than others based on the audio and what the AI was trained on. If you think it didnt work well on your song try a better file format or try another song.
There did, but because it has been interpreted as being a tool to promote downloading copyrighted material, I have removed it for the time being. I know several of you were using it legitimately inline with copyright law, however, I want to avoid any legal hassle as I am just a 1 man team.
Please continue to use the Upload File functionality in line with copyright laws.
Please write a question via the Contact page if this doesn't answer your question.
AudioStrip developed by: Basil Woods
Spleeter: a fast and efficient music source separation tool with pre-trained models
Romain Hennequin and Anis Khlif and Felix Voituret and Manuel Moussallam