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Keylark

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Overview

Play along with any song on a keyboard. You keep the rhythm; Keylark picks the notes, from the chords it hears in the song.

Play along with any song, even if you don't play the piano. Open a song in Chrome, plug in a MIDI keyboard (or use your computer's keys A to K) and press keys in time. You keep the rhythm; Keylark picks the notes, from the chords it hears in the song. HOW IT WORKS 1. Open a song on YouTube and click Keylark's button on that tab. Keylark opens in the side panel, beside the song. 2. Press "Listen to this tab". 3. Play along. The left hand plays the bass and the right hand plays the chords. Choose Chords or Solo. You can also use Keylark on its web page, with a song file of your own, with a tab shared through Chrome's "Share tab audio", or with the demo song. TWO PLAYS The first time through, Keylark plays along by ear while it learns the song. It is least sure just after a chord changes. Play the song again and it knows every chord change before it comes. Song files and the demo song are learned before they play. Two sounds: a grand piano and an electric piano. It can also send what you play to another program on your computer, as MIDI. WHAT YOU NEED - Chrome or Edge on a computer. It does not work on phones or tablets, or in Safari or Firefox. - A MIDI keyboard is best. Without one, the computer's keys A to K play. - Wired headphones, or the computer's speakers. Bluetooth headphones add a delay, and Keylark warns you when it sees one. FREE, AND WHAT YOU PAY FOR Free: play along by ear on any song, and the full chords on 3 songs of your choice, plus the demo song. Paid: the full chords on every song. €45 a year or €6.99 a month (£39 or £5.99 in the UK), VAT included. 30 days money back. Cancel any time. Founding offer: 25% off the yearly price, for as long as you stay, for the first 300 buyers. Enter the code FOUNDING at checkout. Adding the extension costs nothing, and nothing is paid inside Chrome. If you buy, you pay on a checkout page run by Polar, who sell Keylark for Marc Scully. Terms: https://keylark.app/terms/ Refunds: https://keylark.app/refunds/ PRIVATE Nothing you play or hear leaves your computer. Keylark keeps only the chord names and times it learned, in your browser, and forgets any song you ask it to. The one thing it sends anywhere is the licence check for the paid part: your licence key and a random name for your computer, sent to Polar. There is no account, no analytics and no advertising. ABOUT THE WARNING WHEN YOU ADD IT Chrome says Keylark can "read and change all your data on all websites". Chrome shows that for any extension that can hear a tab. Keylark hears only the tab you click its button on, and only while you listen. It does not record the sound, keep it or send it. On YouTube it also reads the video's title, address and position, so it knows where the song is. Nowhere else. YOUTUBE IS FOR PRACTICE Keylark listens to a song as it plays and never downloads a video or its sound. YouTube is for practice. For a gig, open your own backing tracks as song files. Keylark is not made by, or connected with, YouTube or Google. Help: https://keylark.app/help/ Privacy: https://keylark.app/privacy/ Credits are in Keylark's About screen.

Details

  • Version
    1.0.2
  • Updated
    October 16, 2026
  • Features
    Offers in-app purchases
  • Offered by
    Marc Scully
  • Size
    7.32MiB
  • Languages
    English (United Kingdom)
  • Developer
    MARC THOMAS SCULLY
    13 Saint Fiacre's Place Kilkenny, Co. Kilkenny R95 CR2F IE
    Email
    marcscullymail@gmail.com
    Phone
    +353 87 638 2230
  • Trader
    This developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.

Privacy

Manage extensions and learn how they're being used in your organization

Keylark has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

Keylark handles the following:

Authentication information
Web history
Website content

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site

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