Bordona: Drone & intonation
Practise intonation over a steady sound.
Choose a root and a chord and the sound plays without a break; you tune your instrument or voice against it. In just intonation the beating disappears when a note settles into place. Sounds are generated on the device; no account or internet connection is needed.
$6.99One-time purchase14-day refund
Key features
- Root and chord
- The root is chosen on the circle of fifths; it plays a single note, a fifth, major, minor, sus2, sus4 or a custom chord with intervals you choose. It can be shifted an octave up or down.
- Just and equal temperament
- In just intonation the intervals are built on exact ratios from the root, and the app shows how many cents they differ from equal temperament; equal temperament matches the piano and fretted instruments.
- Layers
- The root, the chord tones and the lower and upper octaves are separate layers; each can be switched on or off and has its own volume.
- Timbres
- Tanpura, organ, strings, soft pad, ney and pure sine. Brightness, master volume and fade-in / fade-out time are adjustable.
- Cycling
- The root moves round the circle of fifths, chromatically or through the preset list at a set interval (seconds or minutes), or manually with the N key.
- Reference
- The A4 frequency is adjustable (e.g. 415 baroque, 440 standard, 442–443 for many orchestras).
Data processing and privacy
Bordona does not connect to any server. Sounds are generated on the device in code; presets and settings are stored only on this device. There are no accounts, ads or tracking.
Get Bordona
Try it in the browser without installation; for continued use, purchase the version for macOS, Windows or Linux.