A friend asks you to sing at a small weekend gathering. You already know the song. What you do not have is a clean backing track, and you are not sure what you are allowed to do with the recording once you make one. So you sit down for a single working session with two goals: produce something you can rehearse with, and settle the permission question before anything leaves your device.

This walkthrough follows that session from start to finish. Each checkpoint is a moment where you stop, listen, and choose. The choices are yours; the app helps you prepare audio, but it does not grant rights to any song or video.

Checkpoint 1: Decide What the Track Is For

Before touching any audio, write one sentence about the intended use. The sentence controls everything that follows.

  • Private rehearsal only: you will sing along at home and the file stays with you.
  • Shared with a small group: you will send the track to a pianist or a friend who is helping you prepare.
  • Published or performed publicly: the recording will be posted, played at an event, or used in a video others can see.

These are examples, not a legal classification. The point is that permission to use a song as a backing track depends on what you plan to do with it. A file for your own ears and a file attached to a public video are different situations, even when the audio sounds identical.

If you cannot describe the use in one sentence, you are not ready to process the song. Decide first, then edit.

For this session, imagine the answer is the middle case: rehearsal plus sharing with one friend. That keeps the scope small and makes the next decisions easier.

Checkpoint 2: Prepare the Source and Listen Before You Separate

You have two possible sources: a video from your photo library or an audio file already on the device. Pick the one with the least noise and the fewest interruptions. A live clip with crowd chatter will separate less cleanly than a studio recording, and results always vary with source quality, mixing, noise, and compression.

Play the source once from beginning to end. Note three things:

  1. Where the vocal enters. You need to know what the accompaniment should sound like when the singer is silent.
  2. Any section where instruments and voice overlap heavily. These are the places where separation will be least clean.
  3. Whether the file is loud and clipped. Distortion in the source tends to survive processing.

Import the file, then choose a processing mode. Fast mode is the sensible first attempt when you only need a rehearsal guide. Fine mode is worth the extra time when you plan to share the result or when the mix is dense. Treat this as a first pass, not a final master.

What to listen for on the first result

Play the separated accompaniment alone. Check the intro, one verse, and the final chorus. Ask yourself:

  • Is the lead voice gone enough to sing over, or does a ghost of it remain?
  • Did any instrument disappear along with the voice?
  • Does the track sound thin, or does it hold its shape?

If the answer to the first question is no, try fine mode before adjusting anything else. If instruments have thinned out, the source mix is probably the cause, and a different mode may not fix it.

Checkpoint 3: Set the Balance, Then Settle the Permission Question

Use the mixed preview to hear vocals and accompaniment together, then move the separate volume controls. Two adjustment choices cover most rehearsal needs:

  • Voice low, accompaniment high: the standard rehearsal setting when you know the melody and want a guide underneath you.
  • Voice slightly audible, accompaniment high: useful for learning a harmony line or checking an entrance you keep missing.

Make the adjustment, sing a verse, and stop. If you find yourself fighting the track, the balance is wrong. If you can hear your own voice without strain, you are close.

Now return to the sentence you wrote at the start. For private rehearsal, the practical work is done. For sharing with one friend, keep the file within that circle. For anything public, the honest position is this: you need permission from the rights holders for the song and for any source video you used. The app processes audio on your device and does not upload your files to a server, but that privacy does not create any right to publish. The app does not grant rights to music or video.

A short permission checklist

  1. Identify who holds the rights to the composition and to the recording you used.
  2. Ask for permission that matches your actual use, not a broader one.
  3. Keep the reply in writing, including any limits on where the track may appear.
  4. If you cannot get a clear answer, keep the track private.

Save the rehearsal version in recent history so you can return to it, and clean up any experiments you no longer need. A tidy list makes the next session faster.

Closing the Session

One sitting produced a usable rehearsal track, a clear sense of where separation is imperfect, and a permission answer that matches the plan. That is a better outcome than a perfect-sounding file with an unclear use. Before your next session, change one variable at a time — source, mode, or balance — and note what improved. The habit of deciding the use first will keep you out of trouble long after the song is learned.