March 17, 2014 at 10:04 am

The Auto-Canonizer Remakes Any Song by Turning Melody into Harmony

auto-canonizer paul lamereNow that the dust has settled from SXSW, we’re poring over the best stuff from the trade show, points made at panels, and what we saw at the first ever SXSW Music Hackathon Championship. Expect more coverage there soon, but for now, what concerns us is the Auto-Canonizer, from the hackathon.

One of the most intriguing ways to sing a song with other people (and I don’t think I say this just because my mother is a teacher of music teachers) is the canon, which starts the same melodic figure at different times to create harmonies. Sound complicated? It’s not, really — you probably already know a type of canon called the “round,” which includes exact repeats of melodies that sound good, time-shifted against each other — think “Row, Row, Row Your Boat.”

At the SXSW Music Hackathon Championship last week, one of our favorite creations was Auto-Canonizer by Paul Lamere (director of developer platform for The Echo Nest, publisher of It analyzes any song you upload, looking for segments that would harmonize well with each other (Lamere explains), then plays them at the same time.

Yes, it turns any song into a canon of sorts, thus its name. The Auto-Canonizer has different effects, depending on what you feed it. The app can remake a normally sweet, almost cloying ukulele version of “Somewhere Over The Rainbow” into unresolved stasis, and even turn Adele’s “Someone Like You,” which you’ve heard a million times, into something new.

You can try it for yourself here — or check out this demonstration of what happens when Weezer’s “El Scorcho” gets run through the Auto-Canonizer:

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Read more about the Auto-Canonizer on Music Machinery.