How to Add Sound to Your Bulin 47 AI Video

Why the video is silent

The generator removes audio on purpose. Music in a clip is protected by copyright, and generated audio for this kind of scene is often blocked as potentially copyrighted. A silent file avoids that problem and lets you choose the sound yourself.

It also means you can add the sound people are using right now, which is what makes a video fit the trend.

Before you start

• Download the MP4 to your phone from My videos, so it is in your camera roll.
• Open the app you will post on and update it, because sound buttons move around between versions.
• Turn on your sound and use headphones so you can judge the volume.

TikTok

1. Tap the plus button and choose Upload, then pick your video from the camera roll.
2. Tap Next and look for the Add sound option at the top of the screen.
3. Search for the sound you want, or open the suggestions or favorites list.
4. Preview it, then tap the check mark to confirm.
5. Trim the sound so the part you like lines up with the start of the video.
6. Tap Next, turn on the AI-generated content label, add a caption and post.

Instagram Reels

1. Create a new reel and select your video from the gallery.
2. Tap the music icon or the Add audio option.
3. Search for the audio or browse the trending tab.
4. Choose the part of the track that fits, then confirm.
5. Adjust the volume if the app lets you mix audio levels.
6. Switch on the AI label option, write the caption and share.

YouTube Shorts

1. Open the plus button, choose Shorts and pick your video from the gallery.
2. Tap Add sound at the top of the editor.
3. Search or browse the library and tap the track you want.
4. Pick the section of the sound and confirm.
5. Add the altered or synthetic content disclosure if it is requested during upload, then publish.

Choosing a sound that works

• Look at what is trending in your region right now. Sounds rise and fall quickly.
• Pick a sound with a clear beat so the gestures in the video feel in time.
• Check how many videos use it. Very new sounds can give more visibility, very old ones less.
• If you use a business or brand account, some platforms limit the music library. Use the commercial sound library instead.

Fixing common problems

• The sound is missing from search: it may not be available in your country or on your account type. Try another sound.
• The beat does not line up: trim the start of the sound or the video until the first gesture lands on a beat.
• The sound is too loud: lower the volume of the added sound, since your video has no original audio to balance against.
• The platform says the sound is unavailable after posting: choose another track and republish.

A note on rights and honesty

Use sounds from the platform's library, which comes with its own usage terms. Do not upload the original song or someone else's recording of it.

We do not host the original song, and the videos we generate carry no audio. Label your post as AI-generated and credit the original creators when you can.

Timing the sound to the video

A silent video gives you full control over the timing. Play the clip a few times and notice where the first strong gesture happens. That is the moment you want to land on a beat of the sound.

Most editors let you drag the sound earlier or later, or choose which part of the track starts first. Try two or three starting points and keep the one where the movement and the rhythm feel naturally together. If the platform has a beat sync option, you can try it, then check the result by ear.

Common questions

• Can I add the sound before downloading? No. The generator gives you a silent MP4, and the sound is added in the app where you post.
• Will the sound change my video quality? Adding a sound does not change the picture. Quality depends on the file you upload and on each platform's compression.
• Can I use my own music? You can use your own original music if you own the rights. Do not use songs you do not have permission to use.
• Do I have to use the trending sound? No. Trending sounds can help reach, but any sound that fits the video and that you are allowed to use is fine.

Quick checklist

• Download the MP4 to your phone.
• Open the posting app and add your video.
• Add a trending sound from the in-app library.
• Trim so the first gesture lands on a beat.
• Turn on the AI-generated label and post.