By Xiao Yixiang

  • Category: Music
  • Release Date: 2013-05-20
  • Current Version: 1.0.2
  • Adult Rating: 4+
  • File Size: 1.04 MB
  • Developer: Xiao Yixiang
  • Compatibility: iOS 6.1+
Score: 3.5
From 55 Ratings


Chordec does chord recognition for songs from your iOS device. It was originally developed by Weibin Shen and is now re-released. Its algorithm has the highest accuracy among published algorithms till at least the end of 2012. Chord recognition accuracy under default Sensitivity value: 82% if counting only major and minor chords, 65% if counting only maj, min, aug, dim, 7, maj7 and min7 Chordec features a Sensitivity slider. It can change the sensitivity of the chord recognition model. Although the default value of this slider can return meaningful chord estimation results for majorities of the music out there, for some music, tweaking this value may return a better chord recognition result. Special Thanks To: Georgia Tech Center for Music Technology (GTCMT) International Society for Music Information Retrieval (ISMIR)


Chordec ScreenshotChordec Screenshot


Dont work on ios 11!!!!

When is the new update going to be available i paid for it and now cant use it please fix
By ohh hell no

we need update to IOS11

we need update to IOS11
By Gerber0319

Update please

Please update the app so it works with IOS 11
By Jpitsme


Will there be any updates? Maybe some chord extension like 7#5#9, or dim7 or 7b9 etc... since iOS has changed will there be any updates??
By iWealthy

Holy Crap

It's soooooo worth it !!!
By Saltwater cowboy 70

Doesn't work with Apple Music

This won't load any of my songs that I have downloaded from Apple Music.
By Matt_M

Doesn't load songs

I want my money back, all my music is downloaded to my Icould and it still doesn't load the song. Disappointed, I want my money back
By Naysin

so useful

only used on 1 song so far, but chord analysis was pretty on point and the ability to slow down or speed up is just awesome. easy, intuitive interface design. one thing i do miss is the ability to change the key of an analyzed song. other than that, i'm super pleased with my purchase ! x
By jadekmmmny

Great app. Txt Dv

Xiao. Thank you. Watched demo on YouTube. Could see your passion for coding and as a musician. I have found it very helpful. thank you!!
By JIA74


I couldn't believe how well this app works! I had low expectations before purchasing but now I'm glad I bought it. Well worth the money.
By Rsherota


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