How to Slow Down YouTube Videos Without the Chipmunk Effect

Drag a player's speed down the normal way and the audio sinks with it — the pitch drops and voices slur into a droning blur. Capo separates speed from pitch, so you can take any video down to a quarter speed and the voice or instrument still sounds like itself, just slower. It's the difference between practising and squinting through mud.

Slow down a video without the deep, droning voice

Half-speed playback is perfect for transcribing a guitar solo, shadowing a language, or catching a fast explanation — but only if it stays intelligible. Capo holds the pitch constant while it stretches time, so a video at 0.5× sounds like the same speaker talking slowly, not like a record dragged to a halt. If you want to know how that works under the hood, read why slowing audio doesn't have to sound weird.

Finer control than the built-in menu

YouTube's speed menu jumps in big steps and bottoms out at 0.25×. Capo gives you a smooth slider with fine increments, and it works on players that have no speed control at all. If you also need the part in a different key, you can change the pitch at the same time — the two are independent.

How to slow down a YouTube video

1. Add Capo to Chrome or Firefox.
2. Open it on the YouTube tab while the video plays.
3. Pull the speed slider down to 0.5×, 0.25× — wherever it clicks for you.
4. Optionally set an A–B loop to repeat the hardest few seconds.

Built for learning by ear

Slowing playback is the single most useful thing you can do when learning music or a language from a recording. For a full walk-through of the technique — slow, loop, and transpose together — see how to learn a song by ear.