Guides

Best TikTok Hook Length for Slowed and Reverb Clips (8 to 20 Seconds)

2026-01-06 · Updated 2026-10-11

How to choose the 8 to 20 second window of a slowed + reverb edit for TikTok, where the chorus lands after slowing, and a cheap way to test two hooks against each other.

A slowed and reverb edit lives or dies on TikTok in its first two seconds, and the clip you post is rarely the whole song. It is a window of 8 to 20 seconds that you choose. Pick the right window and the sound gets saved, reused and searched for. Pick the wrong one and the edit scrolls past like everything else. This guide is about choosing that window, and about one detail most people get wrong: when you slow a song in the slowed reverb maker, every timestamp in the original moves. The chorus that started at 0:58 is no longer at 0:58.

I will cover how long the hook should be, how to find the moment that works, how to recalculate timestamps after changing speed, and a cheap testing method that uses two uploads instead of guesswork. If you have not made an edit yet, start with how to make a slowed and reverb song and come back.

Why the length window is 8 to 20 seconds

TikTok sounds get reused when they are short enough to fit over someone else's video and long enough to carry a recognisable phrase. Under 8 seconds a slowed edit has not had time to breathe. The reverb tail is a big part of the style, and a tail needs a gap to ring into. Over 20 seconds the clip starts to feel like a full listen, which is fine for YouTube but works against the loop behaviour that TikTok rewards.

Inside that range the right length depends on what the segment contains:

These are starting points, not rules. The honest answer is that the best length is whatever lets the clip end at a musical boundary. A clip that cuts off mid-word at 15 seconds does worse than a clip that resolves at 13.

Slowing stretches time, so recalculate every timestamp

This is the part that trips people up. At 0.85x speed, the song takes 1 / 0.85 = about 1.18 times as long. A chorus that begins at 0:58 in the original begins at roughly 1:08 in the slowed export. The chorus itself, if it lasted 20 seconds, now lasts about 23.5 seconds.

The formula is simple: new time = original time / speed.

Two consequences follow:

1. A 12 second hook in the original is a 14 second hook at 0.85x. If you planned your segment while listening to the original, it will overrun on the export. Plan on the export.
2. A drop you want to land at second 3 of the clip needs to be cut from 3 seconds before its slowed position, not its original position.

The editor's live preview uses the same chain as the export (with Preserve pitch off, which is where it belongs for this style), so the simplest fix is to find your moments while previewing at your chosen speed, not while listening to the untouched file. Write the slowed timestamps down. You will need them again when you cut.

Where to place the payoff inside the clip

Most strong slowed edits on TikTok follow one of three shapes.

Cold open on the hook. The clip starts on the first word of the chorus. No build. This works when the vocal line itself is the attraction and the reverb gives it immediate scale. Keep it 9 to 12 seconds and let the last word ring out.

Two beats of air, then the hook. Start about one slowed bar before the chorus. At 0.85x a bar of a 120 BPM song lasts about 2.35 seconds, so you get a short breath of atmosphere and then the line. This is the most forgiving shape and the one I would default to.

Build and release. Start 8 to 10 seconds before the drop, let the tension climb, land the drop around the two-thirds mark, and give the rest of the clip to the groove. This needs the full 16 to 20 seconds and only works on songs that actually have a build. A slowed drop with heavy Bass at +6 to +8 dB is a physical moment on headphones, which is why this shape gets saves.

Whichever shape you use, the moment of maximum interest should sit in the first three seconds or at the two-thirds point. The middle of the clip is where people decide whether to keep watching, and it should not be where the surprise is.

Settings that help a short clip read quickly

A full-length edit can take its time. A 12 second clip cannot. A few adjustments from the usual full-song settings help:

• Slightly less Reverb. 35 to 45% instead of 50%. On a phone speaker, through TikTok's own compression, a wet mix above 50% blurs the first word of the hook.
• Moderate Space. 2.4 to 3.0 s. A 5 second decay sounds wonderful on a full track but in a 10 second clip the tail from the first phrase is still ringing when the second arrives.
• Bass +5 to +7 dB. Phone speakers lose most of it anyway. What survives gives the clip weight.
• Tone -2 to -4 dB. Enough to darken, not enough to lose the consonants.

Do not change the speed between the full export and the clip. Export the whole song once, then cut. The bulk tool is useful if you are preparing several songs in one session, because you can apply the same settings to every track and download one ZIP.

A testing method that costs nothing

Guessing which hook works is slower than testing it. Here is a method that needs no analytics beyond what TikTok gives every account.

1. Export the full slowed track once at your chosen settings.
2. Cut two candidate clips from the export. Make them different in placement, not just length. For example, cold open on the chorus versus build into the drop.
3. Post them a few days apart with the same caption style and similar visuals. Posting the same day splits your own audience.
4. After each has had 48 hours, compare three numbers in the analytics tab: average watch time as a share of clip length, the number of times the sound was used, and saves.
5. Keep the shape that won and apply it to the next song. After five or six songs you will know what your audience responds to for your genre, and you will stop guessing.

Do not compare raw view counts. A clip that got pushed to more people for reasons unrelated to the audio will win on views and tell you nothing. Watch share and sound reuse are the numbers tied to the hook itself.

Common mistakes

Cutting from the original, then slowing the clip. This gives you a clip whose reverb tail is cut off at the end and whose length is 18% longer than you planned. Always slow the full song, then cut.

Starting on silence. Even one second of near-silence at the start is a swipe. If the segment you want begins quietly, start on the beat before it instead.

Ending mid-word. Trim to the end of the phrase and let the reverb tail finish, or trim to a beat and let the loop take over.

Different speeds for different clips of the same song. If you post three clips from one edit, they should sound like one edit. Consistency is what turns a single clip into a recognisable sound.

Posting a 96 kbps export and worrying about it. The editor exports MP3 at 96 kbps, 32 kHz, which is tuned for fast encoding inside the browser. TikTok re-encodes everything you upload. For a clip, the difference is not audible. For a distribution master you would use a WAV source and a DAW, which is a different job.

Lengths by genre, as a starting grid

Treat the grid as a first guess for your test, not a verdict.

Open the free editor: upload MP3, WAV, AAC, OGG or FLAC, adjust speed, reverb, bass, tone, width and space, then export MP3 or a ZIP of many tracks. Everything runs in your browser.