🎵 JG Music Tools

Sheet music library, tuner, recorder & live-broadcast — for Windows & Android.

📱 Android v1.78A12true native

Capacitor-native Android app. Sheets, tuner, recording, live-broadcast. Mic permission auto-granted. v1.77E: targetSdk lowered to 33 + universal architecture for broader compatibility (Samsung Knox / Z Flip friendly). Min Android 5.1.

⬇ Download APK

💻 Windows v1.78A12 installertrue native

Real Windows installer EXE. Registers in Add/Remove Programs. Start Menu + Desktop shortcuts.

⬇ Download Installer (93.2 MB)
Updated Jun 18 2026 · 6:33 PM · v1.78A12
Or: portable ZIP (no install, 93.3 MB)

🍎 Mac v1.78unsigned

Native Mac app (Electron). Pick the right one for your processor — Intel or Apple Silicon (M1/M2/M3+). Since I haven't paid for Apple notarization yet, you'll need to right-click → Open the first time.

⬇ Mac Intel (283 MB) ⬇ Mac Apple Silicon (268 MB)

📱 iPhone / iPad source bundle

No signed IPA yet (Apple App Store distribution requires a $99/year Apple Developer account I haven't bought yet). Source bundle for anyone with a Mac + Xcode 15+ to build & sideload to their own device.

⬇ iOS source bundle

📲 Android install

  1. Tap Download APK on your Android device
  2. Open the downloaded file (notification or Files app)
  3. If prompted: enable Install unknown apps for your browser/Files (Settings → Security → Special access)
  4. Tap Install, then open and sign in
⚠️ "Unknown apps" permission is needed because this isn't from Google Play yet.

💻 Windows install

  1. Download the installer (top button above)
  2. Double-click → installer wizard appears → Next, Next, Install
  3. If Windows shows "SmartScreen" warning, click More info → Run anyway (because we haven't paid for the Authenticode signing cert yet)
  4. App appears in Start Menu and Add/Remove Programs like any other Windows app

🍎 iOS users

  1. iOS sideloading is restricted, so open ratzonorchestra.com/app/ in Safari
  2. Tap Share → Add to Home Screen
  3. The PWA installs as a real app icon with offline + live-follow support

🎼 New: Chord transposer

Have a chord chart PDF in the wrong key? Drop it into the JG transposer — pick how many semitones to shift, download a transposed PDF. Works on text-based chord charts (lead sheets, chord-over-lyrics). Runs entirely in your browser — no upload.

🔄 All versions & rollback
JG Music Tools · B"H · 2026 · Build 2026-06-19