Related to your idea, this is what I used in the past https://github.com/saolaolsson/pixiple Works decently well but not automated on what file to delete. Source: 11 months ago

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Try mixing in key. It changed my whole sound. But limits what can be played. I use Mixed In Key to look through my entire library and match up songs I normally wouldn’t have thought to. Source: about 1 year ago

I’ve made a practice of scanning my sample library with Mixed in Key and have each sample labeled with a code [Key&BPM] so that I can search for compatible audio clips with ease. I don’t limit my search to exact key matches either, so harmonic elements are always within reach. Source: over 1 year ago

I have taken the liberty of labeling each file with the BPM and Key for ease of use, however they may not be entirely accurate as I am using Mixed in Key to automatically detect this stuff as it would just take way too much time otherwise. There's not much I can do when it comes to tempo and key-changes, so I apologize in advance if they are mislabeled. Source: over 1 year ago

Hey mate, if you think you will be playing some melodic stuff and want to mix in key, check out "https://mixedinkey.com". It will allow you to sort all your tunes in key and help with showing you how to move from one key to another while still sounding cohesive. Source: about 2 years ago