CG Suite / Pulsar / LyraManual

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Microphone Calibration, Settings & FAQ ​

This guide details the universal microphone calibration system, common system settings, and solutions to frequently asked questions.

Supported Applications

Microphone sensitivity calibration and troubleshooting instructions apply to all three apps: Classical Guitar Suite (CG Suite), Pulsar Tuner, and Lyra Score.

Microphone Sensitivity Calibration ​

Hardware input gains differ dramatically across iPhone, iPad, Android devices, Windows PCs, and external USB microphones. All three apps share a unified calibration engine: calibrate once, and optimal input gains synchronize across the tuner, metronome, practice analyzer, studio recorder, String QA, and sheet music mini-tools.

Selecting Input Sources ​

Open the microphone settings card from any tool's settings sheet (tune icon):

  • mic Built-in Microphone: Built-in device mics or condenser microphones via audio interfaces.
  • headphones Clip / Contact Microphone: Piezo pickups attached to the headstock or bridge (calibration values are stored independently from built-in mics).
  1. Tap the auto_fix_high Auto Calibration button.
  2. Ambient Noise Baseline: Remain quiet for a few seconds while ambient background room noise is measured.
  3. Pluck Sampling: Pluck an open string with your typical playing force when prompted.
  4. Optimal gain is calculated to prevent digital clipping while capturing long decaying sustains with high signal-to-noise ratio. A calibrated badge (auto_awesome) confirms completion.

To fine-tune manually, drag the sensitivity slider. Tap restart_alt Reset to return to default settings.

Microphone sensitivity calibration sheetFigure: Microphone sensitivity calibration screen synchronizing gain across built-in and clip mics

Shared Convenience Settings ​

  • 5-Language Localization: Easily switch between English, Japanese, German, Spanish, and Simplified Chinese from the bottom navigation rail or settings menu.
  • Screen Wake Lock: Automatically prevents screens from dimming or locking while tuning or reading sheet music.
  • Smart Resume: Re-launches directly into your last active tab upon reopening (can be toggled in Pulsar Tuner settings).
  • Non-Intrusive Web (PWA) Update Guard: When updates deploy on the Web version, subtle refresh banners (system_update_alt / refresh) appear, strictly guarding against automatic page reloads during active tuning, recording, or performance.

Frequently Asked Questions (FAQ) & Troubleshooting ​

Q1. Bluetooth headphones trigger a "Reduced Audio Quality" warning / pitch detection becomes unstable ​

When the bluetooth_audio warning banner appears, your operating system has switched your Bluetooth headset to the Hands-Free Profile (HFP), downgrading microphone input sampling to narrowband 8kHz–16kHz telephone quality.

  • Solution: High harmonic tracking and strobe accuracy require wideband 44.1kHz / 48kHz audio. When tuning, recording, or analyzing strings, disconnect Bluetooth headsets or use wired headphones / built-in device speakers with the built-in microphone.

Q2. Tuner needle does not respond / microphone cannot be accessed ​

  1. Verify OS Microphone Permissions: If microphone permission was denied on first launch, no audio reaches the app. Open system Settings (or browser site permissions in PWA) and allow Microphone access.
  2. Excessive Background Noise or Low Gain: If air conditioners or fans cause wind rumble, bring the device closer to the guitar (~30cm) and rerun Auto Calibration (auto_fix_high).

Q3. Web (PWA) version produces no metronome or playback sound ​

  • Check if your device (especially iOS / iPadOS) has the Silent Mode (mute switch) engaged.
  • Under browser Autoplay Policies, audio playback is locked until the page receives an initial user interaction. Tapping the play button unlocks audio.

Q4. Can I use sheet music or tuners offline (Airplane Mode)? ​

  • Pulsar Tuner: Operates 100% offline at all times.
  • Classical Guitar Suite / Lyra Score (Native Apps): Previously opened scores (locally cached) and pinned pieces remain fully accessible with smooth page turns and annotations in Airplane Mode. Changes sync to Google Drive once reconnected.
  • Web (PWA) Score Reading: Requires Google Drive connectivity due to browser storage boundaries. For unreliable venues, native apps are strongly recommended.

Q5. I manually placed PDFs into the Lyra_Scores folder on Google Drive, but they don't appear in the app CG Suite / Lyra ​

To protect personal cloud files, the app uses strictly scoped access (drive.file) and only detects files created or uploaded through the app itself.

  • Solution: Import files using the app's Add menu. To upload large collections at once, log into the Web (PWA) app on your computer and select "Import Folder" (see Score Import Guide).

Q6. Running low on device storage? (Managing Score Cache) CG Suite / Lyra ​

Open Cache Settings from the sheet music library to adjust cache limits or clean unpinned local PDF files. Cloud originals on Google Drive and remote annotation data remain completely untouched.