Knowing the 'Key' of a song is essential for DJs to mix harmonically. It would be a useful and simple addition to the Sort Your Music web application using the Echo Nest track metadata.
Many times I'll make a playlist full of potential songs to put in a future mix. I'll look through the songs, find the BPM and key using a free iPhone app for DJs, and store that information in a spreadsheet. Then I'll go through that list to choose songs for the mix, and put them in an order that works (greatly considering BPM and key) before I purchase the songs.
Now I use the 'Sort Your Music' web app for BPM, which is great, but I still have to go through all the songs one by one to identify the key with the iPhone app.
Please implement this simple, powerful feature!
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This is really helpful for DJs on the Spotify desktop app.
Instead of taking up screen space for all users, you could make it an option in preferences to toggle the display of tempo (bpm) and the key (root note) of all songs. Additionally, you could provide the Camelot notation for even easier use by DJs or anyone interested. The features provided by Djay 2 are nice but constraining.
It wouldn't be too hard implement (key and tempo can already be retrieved with an Echo Nest API call) and a great feature.
Artist Name: Kanye West
Title: All of the Lights
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