Answers to the most common questions about Serious Glyph Tuner. Can't find what you need? Email us directly.
Serious Glyph Tuner supports Nothing Phone 1, Nothing Phone 2, and all later Nothing Phone models with the Glyph Interface. The app requires NothingOS and the Glyph API to be active.
The Glyph Interface must be enabled on your device. Go to Settings → Glyph Interface and make sure it's turned on. If you're running a developer build of the app, the Glyph API debug mode may need to be re-enabled after 48 hours — this is a Nothing OS limitation for development builds.
The app requires microphone access to detect pitch from your instrument. This is the only sensitive permission requested. We do not access your contacts, location, camera, or storage. Analytics are collected via PostHog and Sentry — see our privacy policy for full details.
Yes. Chromatic mode detects any pitch across the full musical range. Instrument presets are available for guitar (E2–E4), bass guitar (E1–G2), ukulele, and violin. The tuner will work with any instrument that produces a clear fundamental frequency.
The app uses the YIN algorithm with a 4096-sample analysis window. In controlled testing against 14,000+ samples it achieves 100% frequency accuracy and 100% cents accuracy across all standard guitar strings. Low E (E2) requires the longest analysis window and may respond slightly slower than higher strings.
Needle mode lights a moving segment along the Glyph arc — like a physical analogue needle tuner. Rotation mode cycles LED segments clockwise when sharp and counter-clockwise when flat, like a traditional strobe tuner. Both modes show a steady centre state when in tune within ±3 cents. You can switch between them in the app settings.
Yes, this is expected. The low E string (82 Hz) has a very long wavelength — the algorithm needs to see at least several complete cycles before it can reliably detect the pitch. At 44,100 Hz sample rate with a 4096-sample window, this takes roughly 93ms. Higher strings respond noticeably faster.
The metronome and tuner are separate modes — you switch between them using the bottom navigation. Running both simultaneously is not currently supported, as each requires full use of the Glyph LEDs.
In the metronome screen, tap the large beat button repeatedly to the rhythm you want. After two taps the app calculates your BPM. Keep tapping to refine it. The BPM updates in real time.