Karaoke Tracks vs Endel

x-minus.pro is a karaoke backing track library where you can search, play, and download tracks across genres and languages. The site hosts a community catalog with over 700,000 tracks, organized into collections by genre, language, and theme.

You can shift the pitch of any track to match your vocal range, build playlists, and browse recent uploads or the top 50 chart. Registered users can upload their own karaoke tracks to share with the community.

The site also includes separate online tools for vocal removal and pitch or tempo adjustment. The vocal remover uses multiple stem separation models and can split vocals, backing vocals, drums, bass, guitar, and other stems from uploaded audio.

Endel generates personalized soundscapes that adapt in real time to help you focus, relax, sleep, or stay grounded during activity. The audio engine uses patented Endel Pacific technology that reacts to inputs like time of day, weather, heart rate, and location instead of looping static tracks. The marketing site describes it as neuroscience-backed functional audio for everyday wellness.

Playlist apps give you fixed songs; Endel keeps regenerating sound on the device so the mix shifts with your context. Focus mode claims up to a 7x increase in sustained concentration versus playlists in peer-reviewed research cited on the site, and Relax, Sleep, and Activity modes each ship with generative visuals. The same engine runs across iOS, Android, macOS, web, Apple Watch, Alexa, Apple TV, and Fire TV.

Students, remote workers, people with ADHD, parents, and anyone fighting insomnia are the implied audience from focus and sleep landing pages plus App Store reviews quoted on endel.io. A free edition exists, while Premium unlocks all modes, offline playback, wearable integrations, and artist collaboration soundscapes like James Blake: Wind Down.