A simple timed delay would improve this frustrating quirk, but it hasn't been fixed in years.m If you could make this easy and accurate you would do every amateur song-writer on this earth a huge favor, though maybe not every amateur listener :)Д¬hordify is great, but for some reason the chords are displayed late when running along side the youtube video. My middle-age voice sounds different to a computer than to my ears. It's funny because I was trying to sing a melody into Musescore just the other day and had to apply a bit of Audacity and then remember theory from secondary school to make it work. Not everything has to have a price as long as everything has a value.

If you're better than the competition you should be profitable, and if your maths is better you're better than the competition. Let your users make your market, you should just make a great tool/service. I wonder how many paying customers Chordify has. I just never thought there'd be a market. Is there a market for 'mathematically superior' tools similar to this? I've been developing this sort of math for more than half my life, and would love to 'productize' it. Really nice, frequently accurate (it's not perfect :-). Has chord diagrams for Guitar, Ukulele, and Piano. Interesting! I just signed up for Chordify, which does extraction of chords from YouTube videos, and then plays them while you play along to either a grid of chords, or an animation showing the current chord and the next ones coming up. The Chordino NNLS Chroma plugin, for instance, can extract even jazz chords fairly accurately

If anyone is interested, Sonic Visualizer with it's vamp plugins is pretty state of the art when it comes to analyzing music. Aubio, a C library for analyzing songs ()

Sonic visualiser chords