automixer.ai vs SetPrep

automixer.ai is a web service that analyzes uploaded music and builds DJ sets with automated transitions. It accepts MP3, WAV, FLAC, and AIFF files, examining each track’s BPM, key, energy, and musical structure. For every transition, it generates and ranks three to five complete options across seven styles: smooth blend, filter sweep, drop mix, echo out, stem swap, vocal ride, and quick cut. It checks transition areas for vocal overlap and says it can reject a mix point or use EQ automation to separate vocals. Exports include MP3 at 320 kbps; paid plans add lossless WAV at 44.1 kHz. The site says exports use EBU R128 loudness normalization. Beatport features include purchase browsing, metadata import, and matching uploads by ISRC, with purchase access on Pro and Studio. Free allows three projects, six tracks per project, five monthly exports, and 1 GB storage. Pro is $14.99 a month; Studio is $29.99 a month.

SetPrep is a desktop app that plans DJ sets from an existing music library. Choose a mixing style and it returns an ordered set, giving each track an energy-arc role, a transition note, and an explanation of its selection. It reads libraries from Rekordbox, Serato, or Traktor, and can also work from a folder of audio files. Ten built-in mixing-style templates draw on analysis of real artist sets. SetPrep can write colour codes, transition notes, and star ratings back to supported DJ libraries. Other library tools include de-duplication, locating missing files, filename repair, and finding forgotten tracks. The beta is available on Mac with Apple Silicon or Intel and Windows with x64 or ARM64, but downloads are invite-gated. The free plan costs nothing and allows three generated mixes per calendar month. Pro Monthly costs £5.99 a month; Pro Annual costs £59.99 a year. Hot cues, loops, memory cues, and structural cues are described as coming soon.