Alto, tenor, and soprano. Praxis handles all the transposition automatically. When you play a written C major on your alto sax, the app knows it sounds as a concert Eb major and labels the notes correctly in your written key so you don't have to do mental transposition. You can change your saxophone type anytime in Settings.

You can play your saxophone directly into your phone's microphone—that's the primary way to use it! Praxis uses on-device pitch detection to identify what you're playing without needing to upload anything to the cloud. If you happen to have a MIDI wind controller (like Emeo, Akai EWI, or Yamaha YDS) or a keyboard, you can also connect it for perfect-accuracy testing or for building backing tracks.

It's very accurate. Praxis uses a YIN-based pitch detector running directly on your device at 44.1 kHz raw, unprocessed audio. Under normal practice conditions, the accuracy is within ±2 cents—which is actually tighter than what the human ear can typically distinguish. Just keep in mind that room echoes, mic quality, and background noise can affect performance, so practicing in a reasonably quiet space always gives the best results.

Yes, the core tools do. Pitch detection, the tuner, session recording, and your practice history all work fully offline. You only need an internet connection for the Praxis Coach (the AI conversation layer) because it runs in the cloud. We're also exploring on-device coaching using Apple Foundation Models for future versions so you can practice completely offline.

Praxis works best for adult learners with at least a few months of saxophone experience—enough to produce a steady tone that the pitch detector can track. If you're a complete beginner, we recommend combining Praxis with traditional lessons or a beginner-focused app for the first few months. Once your tone starts to stabilize, Praxis is the perfect tool to take you further.

No, and we don't want it to! Think of Praxis as your daily practice companion for the six days a week when you aren't in a lesson. A real teacher gives you personal guidance, embouchure correction, and human accountability that AI can't replicate. Praxis just makes sure the time you spend practicing on your own is as focused and productive as possible.

Praxis listens to your saxophone through your phone's microphone in real time, detecting pitch, when each note starts (onset), your articulation, and your dynamics. When you ask the Coach a question, it uses these musical observations to give you specific feedback—like noticing your high B was 8 cents flat or that you rushed slightly on the second half of a phrase.

Absolutely. Your audio is processed directly on your device and Praxis never uploads your raw audio to our servers. The Praxis Coach receives only musical observations (like notes, intonation, dynamics, and scales), never the raw audio itself. You can export or delete all of your data at any time from Settings → Data & Privacy.

It works on iPhones running iOS 15 or later, and Android phones running Android 10 or later. While it works on tablets, the layout is currently optimized for phone-sized screens. You can also optionally connect wired or Bluetooth MIDI devices.

Yes — just tap "Import audio" in the Library tab and Praxis will separate it into stems for you. Mute the lead, play with the band, and loop the hard sections. You can also generate custom AI backing tracks on the fly (available on Pro and Studio tiers) using Lyria.

Both! Praxis tracks pitch accuracy and articulation in real time, whether you're playing bebop chromatic lines, blues phrasing, or classical etudes. The engine keeps up with whatever you play, and your AI coach can give you style-specific feedback on phrasing, tone, and technique. Swing feel analysis and other genre-specific tools are on the roadmap.

While Praxis is in closed beta, you can reach out directly at support@clefscape.com. After launch, Studio tier members get priority support, Pro tier has standard email support, and Free tier users can access the in-app help center. Bug reports that include a screen recording always get the fastest response!