If you only want the instrumental, stop at UVR. You don't need anything else.
Ultimate Vocal Remover separates audio: a song goes in, the vocal and the instrumental come out as separate files. It's free, runs on your own machine, and nothing leaves your computer. At that job, it's the standard.
A karaoke generator does that and keeps going: it transcribes the lyrics, times every syllable, measures the pitch of the notes and builds something playable, with scoring.
In those three cases, installing UVR and stopping there is the right answer. There's no reason to use anything else.
Doing the lyrics by hand after UVR is possible and it's the traditional route: Karaoke Builder Studio or similar, about an hour per song. It isn't hard, it's slow. The real choice is between your time and the accuracy of automatic transcription.
Automatic transcription gets things wrong, and it fails predictably: screamed, distorted, heavily processed or live vocals. On a studio recording with clear diction the result is good; on hardcore, it isn't. Anyone promising otherwise is selling.
No. UVR separates vocals from the instrumental, and does it very well. It doesn't transcribe or sync any lyrics — that's a separate job.
For separating audio while keeping everything on your machine, yes, and it's free. For timed lyrics and pitch scoring it doesn't cover you — that isn't what it does.
Not necessarily. UVR is free and handles the separation. The cost shows up when you want to save the hour of manually timing the lyrics.
StarSinger does those three steps for you. You upload a file you already have, it separates the vocals, transcribes the lyrics with per-syllable timing and gives you a karaoke that plays in the browser, with pitch scoring. You can try it without paying: the Free plan does 3 songs a month and asks for no card — the vertical video comes out watermarked. Past that, Pro is US$ 3.99 a month.
The caveats, because they're real: the transcription gets words wrong on screamed or heavily distorted vocals, and processing takes 2 to 3 minutes per song with the cloud accelerator on, and over 10 when it is down.
Try it free