Machine learning expert and programmer with "music intelligence" company The Echo Nest, Glenn McDonald has used Echo Nest data to develop a clickable music genre map. The map is generated by an unpublished algorithm, but McDonald suggests on his blog that it is arranged according to axes that generally place low-energy music at the bottom left and high-energy music at the top right. Click on a genre to hear an excerpt from a song within that genre, or click the ">>" symbol next to the genre to see a similar clickable map of artists within that genre.