Spotify’s personalized playlist technology infringes another company’s patents, according to a complaint filed Jan. 28.

Excalibur IP LLC also accused Spotify of infringing its audio track identification software patents.

Excalibur IP LLC owns U.S. Patent Nos. 7,454,509; 8,160,840; 8,352,331; and 8,932,148. The patents cover software that compares data thumbprints on audio files, tailors transmissions based on audience preferences, and discovers relationships and recommends items based on user behavior.

Spotify’s software used to fingerprint audio tracks and create personalized playlists based on listener behavior and radio stations based on specific songs, albums, or artists infringe the patents, according to Excalibur’s suit...