How to add your own sound to a TikTok slideshow

To add your own sound to a TikTok slideshow, select your photos, tap Next, then tap Sound at the bottom of the edit screen and tap Add sound. Search the sound library, tap a track to add it, then tap the sound clip to trim it. If you want your own voice instead, tap Voice on the side panel and record a voiceover. TikTok documents one sound per post, so trim before you commit. What TikTok does not document is uploading an audio file from your phone to a normal post. If you own a track TikTok does not host, build the slideshow in an editor, export it, and upload the finished video instead. Every tap below comes from TikTok's own Help Center.

If you are still choosing when to publish, our best time to post on TikTok guide and the Saturday posting breakdown cover the scheduling side of the same post.

Add a sound to a slideshow, tap by tap

This is the path TikTok's Help Center describes for a photo post built from your camera roll.

1. In the TikTok app, tap the Add post + button at the bottom.
2. Tap Photo, then tap Upload and select your images. TikTok allows up to 35 photos in one post.
3. Tap Next. This is the editing screen.
4. Tap Sound at the bottom of the editing screen.
5. Tap Add sound. If a sound is already on the post, the same control reads Replace. You can also tap the sound shown below the track to replace it.
6. Select or search for a sound. TikTok's wording is that "the sound will automatically be added to your post", so there is no separate confirm step here.
7. Tap the sound clip to make additional edits, such as trimming it.
8. Tap Next again to reach the post screen, add your description and hashtags, then tap Post.

There is a second entry point. TikTok also documents adding a sound from the recording screen before you ever reach the editor: tap Add sound at the top of the recording screen, then pick from the For You, Favorites or Recent tabs, or tap the Search button and tap the Continue button to confirm. TikTok's note is that you can also add a sound while on the editing screen, which is the path most slideshow builders use because the photos are already in place.

One warning that TikTok states plainly: once you change the music successfully, "all previous background music and voices will be replaced". Swapping the track late wipes a voiceover you already recorded.

Record your own voice instead of a track

If "your own sound" means your voice rather than a music file, this is the documented path, and it is the closest thing TikTok offers to bringing in audio you made yourself.

1. From the editing screen, tap Voice on the side panel.
2. Tap Record at the bottom.
3. Tap the Record button to record your voiceover.
4. Tap Done to save your voiceover audio.
5. If you want a voice effect, select one now.
6. Tap Save at the top.

A voiceover is the strongest option for a product slideshow, because it carries information a music bed cannot. It also sidesteps the commercial music problem covered further down, since the audio is yours.

Record the voiceover after the slide order is final. If you reorder slides afterwards, the narration lands on the wrong images.

One sound per post, so trim before you commit

TikTok's editing FAQ is explicit: "You can add one sound to your post." The same FAQ sets the item ceiling at 35 photos or videos in a single editing session.

That single-track limit is the constraint that shapes a slideshow. You cannot fade one track into another inside the app, and you cannot run a music bed under a voiceover, because adding music replaces existing voices. Pick one, and pick it before you build.

Trimming is documented as its own flow:

1. Select a sound to add to your post.
2. Tap the Trim button next to the sound you selected.
3. Drag the slider to set the starting point of the sound.
4. Tap the Confirm button.

TikTok notes that after trimming you can preview the post and adjust again. The starting point is the whole lever here, so use it to land the hook of the track on slide one rather than 12 seconds in.

What TikTok does not document: uploading an audio file

This is where most pages on this query guess, so here is the honest position.

TikTok's Help Center has no article describing how to upload an audio file from your device and attach it to an organic post. The Sounds article covers the sound library. The editing article covers Add sound, Replace, sound effects, voice effects and voiceovers. None of them describes picking an MP3 out of your files.

Music upload does exist on the paid side, and only there. TikTok Ads Manager's Carousel Ads specification, last updated September 2026, allows advertisers to upload their own music at up to 10MB in MP3 format. That is an ad format inside Ads Manager, not something you can do from the app's post flow.

So if you own a track TikTok does not host, or you have licensed audio you must use, the reliable route is to leave the app:

1. Build the slideshow in an editor, with your audio on the timeline.
2. Export it as a video file at the same vertical shape as your photos.
3. In TikTok, tap Add post +, then Upload, and select the exported video.
4. Post it as a normal video.

You lose the swipe pacing of photo mode, because the post is now a timed video. You gain exact control over the audio. That is the trade, and it is worth naming before you spend an hour on it.

Business accounts and the commercial music limit

If you post as a business, the sound library you see is not the library a personal account sees, and this catches people out mid-build.

TikTok's guidance on the Sounds page is direct: if you have a Business Account, you cannot use music on TikTok that is not licensed for commercial use. If you want a non-commercial track, TikTok's own suggested workaround is to post it from a personal account instead.

TikTok's commercial music article adds the reasoning. When you post content that promotes a brand, product or service, TikTok recommends using only the Commercial Music Library, "as it's pre-cleared for commercial use", because "the licenses we hold for music outside of the CML don't cover the commercial use of music in content". If you use an original sound or music from outside the library, you must agree to TikTok's Music Usage Confirmation when the content disclosure setting is on. That confirmation states there is no copyright-protected music in the post, or that you obtained and paid for the necessary licenses.

The practical read for a product account: a voiceover or a Commercial Music Library track is the safe default, and a trending song you heard on a personal feed usually is not available to you at all.

Why the sound decides the slide pace

A slideshow is not a video. Viewers set the pace by swiping, so you cannot time a slide to a beat the way you would in an editor. TikTok gives you exactly one lever over that relationship: the trim point.

Use it on the opening. The strongest moment of a track should sit at the start, not 20 seconds in, because a viewer who swipes quickly may never reach the rest of it. Drag the slider to that moment and confirm.

Keep the slide count honest for the sound you picked. A short, punchy track suits a tight post of a few dense slides. A long, flat bed suits a longer walk through a catalogue. Choosing them the other way round is the most common mismatch we see in product decks.

If you are building a comparison or a before and after, trim so the clearest change in the track sits near the reveal, then put the reveal early enough that a normal swipe rhythm reaches it.

Getting the audio right is quick. Getting 20 slides that hold a swipe is the part that eats an afternoon, which is the part CineRads generates from your product photos and brand assets, so the deck exists before you open TikTok and the only decision left is the track.

Frequently Asked Questions

How do I add my own sound to a TikTok slideshow?

On the editing screen, tap Sound at the bottom, then tap Add sound, then select or search for a track. TikTok adds it automatically. Tap the sound clip afterwards to trim it.

Can I upload my own MP3 to a TikTok slideshow?

TikTok's Help Center documents no way to upload an audio file from your device to an organic post. Music upload exists only for advertisers in Ads Manager, for Carousel Ads, at up to 10MB in MP3 format. For an organic post, add the audio in an editor and upload the exported video instead.

Can a TikTok slideshow have two sounds?

No. TikTok's editing FAQ states you can add one sound to your post. Adding music also replaces any previous background music and voices.

How do I add a voiceover to a TikTok slideshow?

From the editing screen, tap Voice on the side panel, tap Record, tap the Record button to record, tap Done, then tap Save at the top.

Why can't I find the song I want on my business account?

TikTok states that a Business Account cannot use music that is not licensed for commercial use. Business accounts are limited to the Commercial Music Library. TikTok's own suggestion is to post non-commercial music from a personal account.

How do I trim a sound on a TikTok slideshow?

Select the sound, tap the Trim button next to it, drag the slider to set the starting point, then tap the Confirm button. You can preview and adjust again afterwards.

How many photos can a TikTok slideshow have?

Up to 35 photos in a single post, which is also the limit on items in one editing session.

Does changing the sound delete my voiceover?

Yes. TikTok states that once the music is changed successfully, all previous background music and voices are replaced. Record the voiceover after you settle the track, not before.

Sources

• TikTok Help Center: Sounds (Add sound on the recording screen, trim steps, replacement of previous audio, business account commercial music limit)
• TikTok Help Center: Editing TikTok videos and photos (Sound and Add sound or Replace on the editing screen, voiceover steps, one sound per post, 35 item limit)
• TikTok Help Center: Making a post (photo post steps, 35 photo limit, post screen options)
• TikTok Help Center: Commercial use of music on TikTok (Commercial Music Library, Music Usage Confirmation)
• TikTok Ads Manager: Specifications for Carousel Ads (music upload up to 10MB MP3, advertiser side only, last updated September 2026)