Amazing Slow Downer vs Intrada

Amazing Slow Downer slows music without changing its pitch, helping musicians study songs and techniques through repeated listening. On Windows and Mac, playback speed can range from 20% to 200%, and pitch can be shifted by semitones or cents. The Windows version handles MP3, Wave, Windows Media Audio, Ogg, FLAC, and AAC/M4A files in real time. On iOS and Android, speed ranges from 25% to 200%; those versions also support seamless loops during playback and changes to tuning or musical key. Computer versions can be controlled with USB HID devices and MIDI controllers, while the iOS page also describes Bluetooth/MIDI remote control. Mac and Windows versions do not support Spotify or Apple Music playback, and DRM-protected iTunes M4P files are unsupported. Free trial software is available for Windows and Mac, and the mobile pages link to free lite versions. Prices are $9.95, paid once for Android, $14.95, paid once for iOS, and $39.95, paid once for Mac/Windows. Each purchase is a single-user license, with a separate license required for each platform.

Intrada is a practice companion for musicians that organizes repertoire and helps structure practice sessions. Its library holds pieces, exercises, and patterns, which users can arrange into setlists. Timed sessions include a quick rating for each item; users can resume a session or change its duration and focus while practicing. Reusable routines support recurring warm-ups and practice blocks. Intrada says spaced repetition and interleaved practice bring weaker items forward more often and help plan sessions around available time. Analytics track mastery by piece, key, and tempo, as well as practice time and sessions over time. The service is designed with ADHD and neurodivergent musicians in mind. It is available on the web and iOS, and is free during beta with no credit card required. The listed capabilities include practice plans and repertoire management, but not performance feedback or recording and review. Sign-in with Google is available.