People want a voice without the band, or the band without the voice, for many reasons: a karaoke track, an acapella for a remix, a practice track with your own instrument taken out, or a clean vocal for a video. There are four main ways to get there, and they differ a lot in quality. This guide compares them honestly, including where AI still falls short.
Method 1: Look for the official stems first
Before processing anything, check whether an official instrumental, karaoke version or acapella was released. Many film and pop songs have karaoke versions, and producers often share stems for remix contests. These are the cleanest possible source because they were never mixed together.
The catch is availability. Most songs, and almost all older Indian film songs, have no official stems.
Method 2: Phase cancellation (the old trick)
In most stereo mixes the lead vocal is panned to the centre, meaning it is identical in the left and right channels. If you flip the polarity of one channel and add it to the other, anything identical cancels out. Free audio editors have done this for years, usually under a name like vocal reduction or centre channel removal.
It sounds clever, and occasionally it is good enough for a rough karaoke track, but the limits are serious:
- It also removes everything else in the centre, usually the kick drum, the bass and often the snare.
- Stereo reverb and echo on the vocal stay behind, so you hear a ghostly voice.
- The result is mono, and the mix sounds thin.
- It cannot give you the vocal on its own, only a track with the centre removed.
- It fails on mono recordings, which includes many older songs.
Method 3: EQ and filtering
Cutting the frequency range where voices sit can push a vocal back, but instruments share those frequencies, so you dull the whole song without removing the singer. It is useful only as a light clean-up after another method.
Method 4: AI stem separation
AI separation works differently. A model trained on many songs with known parts learns what a voice, a drum kit or a bass guitar sounds like, then estimates each part in your song. It does not rely on where things are panned, so it works on mono recordings too, and it can give you the vocal alone as well as the instruments without it.
Results are usually very good on clean modern mixes. Typical weaknesses are a slightly watery sound on heavily processed vocals, some bleed of cymbals or backing vocals into the vocal stem, and reverb tails that do not fully separate. Old, noisy or very reverberant recordings come out less cleanly than a crisp studio mix.
Separating a song with Autunes Stems
Autunes Stems is AI separation built into Studio. It splits a song into six stems: vocals, drums, bass, guitar, piano and other, each as a 256 kbps MP3. It costs 5 credits a song on Pro (₹599 for 30 days, 300 credits) and Creator (₹2,999 for 30 days, 1,600 credits), takes about a minute for a four-minute song, and refunds the credits if it fails. It is not on the free plan.
- Open Studio and choose a song you made on Autunes, or upload one: MP3, WAV, FLAC, M4A or OGG, up to 50 MB and 10 minutes, confirming you own it or have the rights.
- Choose Stems and split the song.
- Download the vocal stem for an acapella.
- For an instrumental, put the other five stems into any audio editor or phone app and export them together.
- For a practice track, leave out only the part you play, such as guitar or piano.
Which method should you use?
- Official stems exist: use them. Nothing beats the original parts.
- Quick rough karaoke from a stereo pop song, and the bass loss does not matter: phase cancellation is free and fast.
- You need the vocal alone, a mono recording, or a full-sounding instrumental: AI separation.
- You need drums, bass, guitar or piano separately for practice or remixing: a multi-stem tool like Autunes Stems.
- The song is one you made on Autunes: Stems, since the parts were generated together and separate cleanly, especially songs made on Zori5.5 XL.
Getting cleaner results
- Start from the best file you have: a WAV or FLAC beats a compressed video rip.
- Avoid live recordings with crowd noise if you have a studio version.
- Use a gentle noise gate on the vocal stem to clear faint bleed between lines.
- Listen on headphones before you publish; small artefacts hide on phone speakers.
Rights: separating is not owning
Separating a song does not change who owns it. Splitting a film song to practise at home is a private use; publishing its karaoke track, acapella or a remix built from it needs permission from the rights holders, and platforms such as YouTube can match and claim re-uploaded music even when the vocals are removed. Autunes asks you to confirm you own an upload or have the rights for this reason. Songs you made on a paid Autunes plan are yours to use commercially, stems included.