That sort of describes the Pandora approach. Each song has a set of &quot;genes&quot; that describe its tone, musical instrumentation, key signature, time signature, rhythmic syncopation, etc. these genes are then used to find similar music. I&#x27;ve found it to be quite pleasing to discover new music when it&#x27;s seeded with a relatively uncommon song that I like.<p>For instance, I added &quot;Going Through Changes&quot; by &quot;Army of Me&quot;, and its recommendations included songs from bands I&#x27;d never heard of and actually enjoyed, like Radford, Red (a Christian band, one, as an atheist, I wouldn&#x27;t ever have browsed on my own, but ended up really enjoying), Maxeen, Black Lab, and Brand New. Each had &quot;genes&quot; that made their algorithm align them with the seed song.<p>I don&#x27;t use it much right now - I find myself in a cycle of discovery and then stubborn re-listening of the same four or five albums - but I expect I&#x27;ll go back to it the next time I&#x27;m back in that exploratory mood.