Genre: ambient, blues, classical, electronicDance, folkCountry, funkSoul, jazz, latin, metal, pop,rapHipHop, reggae, rnb, rock, singerSongwriter Mood: aggressive, calm, chilled, dark, energetic, epic, happy, romantic, sad, scary, sexy, ethereal, uplifting Sub-genre: bluesRock, folkRock, hardRock, indieAlternative, psychedelicProgressiveRock, punk, rockAndRoll, popSoftRock, abstractIDMLeftfield, breakbeatDnB, deepHouse, electro, house, minimal, synthPop, techHouse, techno, trance, contemporaryRnB, gangsta, jazzyHipHop, popRap, trap, blackMetal, deathMetal, doomMetal, heavyMetal, metalcore, nuMetal, disco, funk, gospel, neoSoul, soul, bigBandSwing, bebop, contemporaryJazz, easyListening, fusion, latinJazz, smoothJazz, country, folk BPM and key: are essentials for every library and DJ. We knew about the problems with double or half-time BPM results. So, we put extra effort to prevent that issue and create one of the best BPM classifiers out there. Key is a no-brainer, and in addition to the dominant key, the API also lets you find the less dominant keys. Voice: The voice classifier categorizes the audio as female or male singing voice or instrumental (non-vocal).  Instrument:  predicts the presence of the following instruments: percussion, synth, piano, acousticGuitar, electricGuitar, strings, bass, bassGuitar and brassWoodwinds. Energy Level: indicates the intensity of an analyzed track which can be variable, medium, high, or low.  Energy Dynamics: describes the progression of the Energy Level from low to high and variable. Movement: describes the rhythmic structure of music on a high level: bouncy, driving, flowing, groovy, nonrhythmic, pulsing, robotic, running, steady, stomping. Character: depicts an expressive form of music that is rather headed towards its appearance than its mood. Provides the following labels: bold, cool, epic, ethereal, heroic, luxurious, magical, mysterious, playful, powerful, retro, sophisticated, sparkling, sparse, unpolished, warm.