SoundSlice
In-depth reviewLiving sheet music synced to audio and video. Slow down recordings, loop sections, and follow along with interactive notation. Used by musicians to learn songs by ear.
SoundSlice, as it opens in a browser tab.
Not sure how to add SoundSlice to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.
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How to install SoundSlice as a PWA
Screenshots
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Why we recommend SoundSlice
Learning a piece from a recording means constantly rewinding to the same four bars, and learning it from sheet music means guessing how it should actually sound. SoundSlice removes the gap by locking notation to audio or video: the score scrolls with the recording, the notes light up as they are played, and you can slow a passage to half speed without the pitch dropping. Loop the two bars that defeat you and play them thirty times at 60 % speed until they stop being hard. It is the closest thing to having the performer stop and repeat the bit you missed — and it runs in a browser, on the phone propped against the music stand.
Best use cases
Working out a guitar solo from the original recording rather than an approximate tab. Practising a jazz standard with the changes visible over the actual audio. Teachers assigning a passage at a specific tempo and knowing the student sees exactly the same score. Transcribing by ear with the notation editor open next to the waveform. Anyone who has ever tried to learn something from a YouTube video and lost the place for the fifteenth time.
Honest limitations
The free tier lets you play and study existing slices; creating and hosting your own catalogue is a paid plan, and the useful limits sit behind it. The synchronisation between notation and audio has to be created — a recording you upload does not align itself, and doing it by hand takes patience on a long piece. Offline use is partial: the app shell loads without a connection, but the audio and video streams do not, so it is not a practice tool for a plane. And the catalogue is only as good as what publishers and users have put in it — obscure repertoire may simply not be there.
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