Capo
Capo ブログ

あらゆる音のピッチ・キー・速度を変える。

ゆっくりにして、自分のキーに移して、つまずく小節をループする。Capo をつくるチームによるガイド。

hands shaping a chord on an acoustic guitar
セットアップ4 分

How to change pitch, speed and volume in your browser

A tour of every free control in Capo: the pitch dial, fine tuning, speed, volume and the A-B loop, with what each one is for.

a guitarist drilling one short phrase, hands close on the neck
練習5 分最新

The bar you keep missing is usually one beat

Looping a whole phrase means drilling the part you can already play. Narrow it until it fails again and the fault is a second long.

an acoustic guitar and headphones on a desk
練習5 分

How to learn a song by ear without naming a single note

You do not need perfect pitch or theory. You need a slow loop, one string, and a way of asking the recording yes-or-no questions.

an open score of a difficult passage, pencilled with practice marks
練習4 分Pro

How to practise a passage faster when you hit a speed wall

Hitting the same wall daily is a sign, not a verdict. Usually the steps are too big, or you are drilling the wrong thing.

a condenser microphone on a boom arm
練習4 分Pro

How to transpose a song to fit your vocal range

Move the song, not your voice. The hard part is not the transposition, it is keeping the singer sounding like a person.

the spinning reels of a reel-to-reel tape machine
仕組み4 分

Why slowed audio sounds underwater

Slowing a tape drops the pitch. Holding the pitch steady is a harder trick, and the artefacts it leaves have a cause.

a close view of a tone knob on an amplifier
仕組み3 分Pro

Why two guitars a few cents apart beat against each other

That slow wobble when two players are nearly in tune is not a metaphor. It has a frequency, and you can count it.

level meters glowing on a mixing console
仕組み3 分

Why Capo ships three time-stretch engines instead of one

Audio quality picks between SoundTouch, Signalsmith and Rubber Band. What each one costs you, and when to change it.

piano keys in black and white
仕組み2 分

Why the pitch dial stops at twelve

A short note on a default: one octave each way, four if you ask for it, and a ceiling set by where the audio stops being usable.

the Transpose panel and the Capo popup side by side, showing each product’s pitch, speed and loop controls
仕組み8 分

Capo vs Transpose: what is different

How the two differ in DSP engine, pitch resolution, formant handling and filtering. Written by one of the two vendors.

a warmly lit studio corner with monitors and outboard gear
セットアップ2 分

Capo free vs Pro: what you keep after you close the tab

The free controls are not a trial. This sets out exactly where the line falls and who genuinely needs the workspace.

a laptop and headphones set up for listening
音のあるすべてのサイト4 分

How to change the pitch of a YouTube video

Shift any video up or down in semitones without touching the speed, on the player you already use. Free, and nothing is uploaded.

a home studio lit low, monitors either side of a screen
音のあるすべてのサイト3 分

How to slow down a YouTube video without changing the pitch

Take any video down to a quarter speed to learn from it, while the pitch stays exactly where it was.

headphones plugged into a phone
音のあるすべてのサイト2 分

How to change the pitch or key of a song on Spotify

The Web Player has no key control. Capo adds pitch, speed and looping to it, and to SoundCloud and Bandcamp.

a broadcast microphone on a desk stand
Pro 機能3 分Pro

How to remove vocals from a song in your browser

Pull the lead vocal down on whatever is already playing, and know in advance which songs will give way and which will not.

a row of channel faders on a mixing console
Pro 機能3 分Pro

How to use an equalizer on YouTube (bass, mud and harshness)

Bass boost is why most people arrive. The equalizer does more, and muddy-sounding tracks are usually a headphone problem.

the keys of an upright piano in warm light
Pro 機能2 分Pro

How to play any song at 432 Hz, and what it actually changes

The shift from A=440 to A=432 is 31.8 cents, a third of a semitone. How to apply it, and what it does not do.

keys out of focus behind coloured light
Pro 機能2 分Pro

How to make a slowed and reverb version of any song

The effect needs varispeed, not the normal speed control. The difference, and the settings that avoid a preset sound.

a backlit computer keyboard in the dark
セットアップ2 分

Capo keyboard shortcuts: the full list and how to rebind

Three surfaces carry shortcuts: the page itself, the popup and the workspace. This maps all of them and covers rebinding.

a laptop with headphones resting beside the trackpad
セットアップ2 分

How to change pitch and speed from the right-click menu

Nine pitch presets and six speeds, without opening the popup. This covers what is in the menu and why volume is deliberately absent.

a microphone in front of studio screens
音のあるすべてのサイト3 分

How to change the pitch or key of a song on Apple Music

The web player has no key control, and its audio is encrypted. Capo shifts it anyway, without downloading anything.

a producer desk with monitors, keyboard and interface
音のあるすべてのサイト3 分

How to change the pitch and speed of a SoundCloud track

SoundCloud has no key control and one coarse speed setting. Capo adds semitone pitch, fine speed and an A-B loop.

someone browsing music on a laptop in a dim room
音のあるすべてのサイト3 分

How to transpose a Bandcamp track to a different key

Bandcamp streams full tracks before you buy. Capo adds the key and speed controls the player does not have.

a phone playing music, held in one hand
音のあるすべてのサイト2 分

How to slow down a TikTok video and keep the pitch normal

TikTok has no speed control on the web. Capo slows a clip to a quarter speed without the voice dropping.

a phone lying on a desk beside headphones
仕組み3 分

Why most audio extensions do nothing on Spotify or Tidal

Protected streams refuse to hand their samples to page scripts. Here is why, and what has to be done differently.

a laptop, tablet and phone side by side
音のあるすべてのサイト3 分

Every site Capo works on, and the handful it cannot

Anything with HTML5 audio or video, plus per-site track detection on ten services. And the real limits.