Help / FAQ

First the cable: connect the keyboard directly to the computer over USB (some hubs drop instruments). Then the browser: when Clef asks for MIDI access, allow it. If you dismissed the prompt, click the permission icon in the address bar and re-enable it. In desktop Firefox, install or allow the MIDI component Firefox prompts for; if Clef keeps listening, fully restart Firefox with your keyboard already plugged in. Finally, open Settings inside Clef and pick your device in the list, then press a key to confirm. A page refresh after plugging in helps on some systems.

Chrome, Edge, Brave, and desktop Firefox. Clef listens to your keyboard through the browser's support for talking to instruments (Web MIDI), which Safari doesn't have. Desktop Firefox asks you to approve a MIDI permission component the first time.

Yes. Clef is available for iPhone and iPad from the App Store and for Android phones and tablets from Google Play. Connect your digital piano over USB and Clef reads it through the app. Browsers on iPhone and iPad still cannot reach a connected piano, which is why the native app is required there.

Download Clef on the App Store · Get Clef on Google Play

Nearly every digital piano and keyboard made in the last two decades. If it has a USB port (often labeled 'USB to Host' or MIDI), or it already works with other music software, it works with Clef.

No. Clef needs to know exactly which keys you pressed and when, and only a direct connection to the instrument provides that reliably. Microphone support does not exist.

Green means you played what's written: the score lights up and moves forward. Red marks a wrong note at the exact spot in the score where it happened, so you always know precisely what went wrong and where.

No. Chords tolerate a natural amount of rolling, so quick arpeggiation within a short window counts as the chord.

By design. Practice mode gives you a metronome, lets you start from any bar, can loop a stretch of bars, and lets you practice one hand at a time; a from-memory review gives you a restart and a 'Show me' when you're stuck. There is no playback speed slider: Clef keeps you playing rather than configuring.

Open the piece in Practice, tap the three-dots menu and choose 'Bars to loop'. Tap the first and the last bar of the passage in the score, then confirm. Clef restarts the passage every time you reach its end. To stop looping, open 'Bars to loop' again and choose 'Use the whole piece'.

Yes, in Practice. Choose Left hand or Right hand from the Hands control (on smaller screens it sits in the three-dots menu). The score stays the same, Clef only follows the hand you chose, and notes from the other hand are ignored rather than marked wrong. Recording pauses while you practice one hand.

After a miss, you re-practice that spot with the score visible. A pass is clean when you play the tested bar with no wrong notes; two clean passes in a row and the bar returns to the normal review schedule.

Checkpoints. Clef first checks short groups of memorized bars. Once neighboring groups are solid, it joins them into progressively longer runs until the whole section connects.

The catalog runs from beginner Bach and the Petzold minuets through Für Elise, Gymnopédie No. 1 and Clair de Lune, up to Chopin's études and La Campanella. Every piece is engraved and checked by hand before publishing, so it is curated rather than scraped, and it grows on request instead of all at once. The library page lists all of it: https://playclef.com/library/

No. You can request any piece from inside the app (title, composer, and a source link) and vote on other people's requests. Requests steer what gets curated next, and right now most of them are engraved and published within a day.

$159 a year ($13.25 a month) or $19 a month, with everything included. Every plan starts with 14 days free. You add a payment method when you start (a card on the web, or your App Store or Google Play account in the apps). Nothing is charged during the trial. We email you before your trial ends, and you can cancel anytime.

Open the Cancel contracts here page, linked at the foot of every page of this site. It works without signing in. You can also cancel in Clef under Settings → Billing. Monthly plans, and yearly plans in their first year, end at the end of the paid period, and you keep access until then. After its first year, a yearly plan ends one month after you cancel, and we refund the unused part. A subscription bought in the App Store or Google Play is cancelled in the store's subscription settings.

Cancel contracts here

Yes. A 30-day no-questions money-back guarantee covers your first payment on the web or in Google Play, monthly or yearly, and EU customers additionally have the statutory right of withdrawal. Apple handles refunds for subscriptions bought in the iPhone or iPad app. See the refund policy.

Yes. Accounts work with email and password or with 'Continue with Google'.

Open Settings → Account and choose Delete account. Clef emails a one-time link that you confirm while signed in to the same account. Access ends immediately and the privacy policy describes the limited records retained for legal obligations.

English and German, fully translated. You can switch in Settings.