Clef — Memorize Piano Music with MIDI Feedback
bar 91 of 106<br>Learn the pieces you love faster and keep them.<br>Clef hears every note over MIDI and re-tests each bar from memory right before you’d forget it. So what you learned last month is still under your fingers today.<br>Start Free TrialTry without a piano<br>No credit card required·Sign up with Google
From adult pianists, in their own words:<br>After two weeks<br>“I am shocked at how quickly I'll forget bits of a song that, just two weeks ago, I had finally worked up to performance level.”
Piano World forums · 40 years of playing<br>After three weeks<br>“After 3 weeks, I tried playing the old songs again but my fingers just didn't know which key to press.”
Piano World forums<br>After four years<br>“Almost 4 years in, and I can't play a whole song through if someone asks me to.”
r/pianolearning<br>It isn’t your memory, and it isn’t your age. Forgetting actually happens on a predictable schedule, but most of us just don’t practice that way.
01The score responds to you<br>One cable from the piano you already own to your computer, and the sheet music on screen responds to your hands. Right notes turn green and the cursor moves forward. A wrong note is marked in red at the exact spot. Clef reads the keys you press, not a microphone. No guessing whether you got it right.
02Memorize one bar at a time<br>Clef shows the bar before as a reminder, and you play the next bar from memory. It tells you instantly whether you had it. New bars get a gentle first pass with the score visible.
03Each bar comes back before it slips<br>The proven spaced-repetition schedule, applied to your hands: every memorized bar is re-tested right when it matters. Miss one, and you re-practice it until it runs clean twice in a row.
04Bring it up to speed<br>Turn on the metronome and play. Clef remembers, for every bar, the fastest tempo you've played it cleanly — and shows exactly which bars are holding the piece back. When you raise the tempo, it's because you've earned it.
05From fragments to the whole piece<br>Every few bars, Clef has you play the whole stretch you've just learned in one run, from memory. Each stretch overlaps the last, so the bars weld together instead of staying separate fragments. Sessions are capped: a done-for-today screen, a streak, and a practice heatmap that shows the habit building.
All of this is easier to feel than to read about.<br>No piano·No account·Nothing to install<br>Try without a piano
HC<br>JD<br>KE<br>LF<br>;G
Feedback that forces you right<br>“I learned the verse of “Someone You Loved” in one sitting because it forced me to get it right.”
Pianist’s blog, reviewing a wait-mode practice app<br>MIDI, not microphones<br>“Now note recognition is working perfectly.”
App Store review, after connecting a MIDI keyboard<br>Spaced repetition, by hand<br>“Practice the piece every second day, then increase the days in between.”
r/piano, advice for keeping memorized pieces<br>Clef puts all three into one practice loop.
The founding cohort<br>Join the first fifty.<br>Why so few? Every requested piece is curated by hand and every support email is answered by one person. The cap keeps both true.<br>Founding bonuses<br>A direct line to the founder<br>Founding feedback visibly shapes what gets built next.
Founding piece priority<br>Your catalog requests go to the top of the curation queue.
“I’m Daniel. I built Clef after one season too many of losing pieces I’d already learned. It runs on my own practice every day, and every support email lands in my inbox.”<br>Daniel Dratschuk · founder, Essen, Germany
The founding rate<br>$9/mo<br>Locked for as long as you stay. $19/mo standard after the cohort fills.<br>What's included<br>Per-note MIDI feedback: green when right, red where wrong<br>Every practice take recorded — listen back any time<br>A tempo map that remembers how fast you can play each bar cleanly<br>Memory reviews scheduled on the forgetting curve<br>The full curated catalog, plus request for new pieces<br>Start Free TrialPlain terms<br>A 14-day free trial. No credit card required; if you do nothing, it simply ends.<br>Monthly billing. No surprise annual charge, ever.<br>A reminder email before the trial ends.<br>Cancel in two clicks from inside the app.<br>30-day no-questions refund on your first paid month.
Questions before you start<br>Do I need a special keyboard?No. Any digital piano or keyboard that connects to a computer works, and almost every instrument made in the last twenty years does. Usually it is one cable, the same kind a printer uses, from the back of the piano to your laptop. (Your manual may call this the MIDI or “USB to Host” port.) Clef reads the keys you actually press instead of listening through a microphone, which is why it can tell you exactly which note was wrong. Acoustic pianos without that connection are not supported yet. And if you want to feel the feedback before connecting anything, there is a short demo that runs right in this...