NumbMix

NumbMix is a playlist engine hooked into Spotify, live at numbmix.numbfede.com. Pick up to 5 genres — even wildly different ones, like phonk × hyperpop — set the mix rules and hit Generate: the engine analyses the most-played tracks, balances candidates across genres and creates the playlist right in your account.

Everything happens in the open: a terminal-style engine log narrates in real time what the engine is doing — candidate pools per genre, artists pulled in, dedupe, choices — down to the link of the finished playlist on Spotify.

Highlights

• Genre mixing — Up to 5 freely combinable genres: the engine pulls and balances tracks across each genre's sources.
• Mix rules — Track count (30/40/50), hits-only / balanced / discovery selection, private or public playlist, custom name.
• Transparent engine log — Every run shows the engine's real log, terminal-style: candidates, timings and decisions.
• Privacy by design — OAuth login with your own Spotify app: the Client ID stays in your browser, no secrets stored on a server.

Features

• Login with Spotify (OAuth)
• Up to 5 mixable genres
• 30/40/50 tracks per playlist
• Hits-only, balanced or discovery modes
• Private or public playlist with custom name
• Real-time engine log
• Playlist created right in your account