Moises separates song tracks in various formats using machine learning for free. It leverages the power of a state-of-the-art source separation algorithm developed by Deezer. Upload a track (or use a youtube link) and get it processed in the cloud.
Moises is great application, not much expensive for users and has many stems which premium users can split in good quality, I must say I'm impressed how Moises developed by years. Now there are finally Wind Stems which makes me go back on their site. Moises besides free one, have now two paid options too. First one is premium 3.99 USD for month which we all know. In this price is included separation of all instrument stems in premium quality. The second one is Pro 24,99 USD for month which includes all instrument stems in HiFi quality and separation dialogue, music and sound effects. Of course there are some yearly options too in both cases. I must say that I am on that expensive plan as I liked sound effect separation, but every Moises users needs to decide what is better for him on his own. Anyway I recommend now this site giving her five stars, because creators of this site deserve it.
Mostly it works. It struggles a little separating organ and horns from electric guitar. I tried multiple songs. Keyboards and horns get put on the guitar track. I tried one with just bass, drums, guitar and vocal. Most of the bass track was with the guitar and in some places the vocal was on the guitar track. Not useful for creating backing track without the guitar on every song, but it works well on some.
Horrible customer service, do not trust them with your credit card their product is buggy and you can find a similar service that won't try to rip you off.