Seyethe Noise $3 USD

1. The Seyethe Standard & Philosophy

Seyethe Noise was designed from the ground up to solve the pervasive problems found in mainstream sleep applications: intrusive subscriptions, battery-draining architectures, aggressive telemetry, and jarring ads.

• Zero Ads, Zero Trackers, Zero Telemetry: We collect zero data. There are no tracking SDKs, analytics frameworks, or behavioral monitors.
• 100% Offline Design: Operates completely self-contained without internet access permissions. Use it in cabins, on airplanes, or on nightstands with network radios disabled.
• No In-App Purchases: No locked sound profiles, premium timers, or artificial cooldowns.
• Sound Off by Default: Audio is always muted at initial launch to prevent accidental blasts of sound in quiet bedrooms or study halls.
• Pure Dark Mode: Deep black background paired with soothing teal and slate accents minimizes blue light and screen glare on OLED displays.
• Battery-First Audio: Custom DSP algorithms leverage intelligent buffer generation and native low-power audio pipelines for all-night playback.

2. Interface Overview & Visual Deck

Seyethe Noise features an uncluttered, single-screen control deck designed for quick adjustments in dark, low-light environments:

• Header: Displays the corporate crest and standardized product title.
• Preset Row: Quick-access memory slots (1, 2, and 3) with discrete LED indicators showing saved data.
• Synthesizer Deck: Four independent mix sliders for White, Pink, Brown, and Fan noise channels.
• Fan Character Control: Modulates the resonant tone and mechanical pulse rate of the acoustic fan simulation. Dims automatically when the fan volume is at zero.
• Dedicated App Volume Slider: An independent vertical touch slider that controls audio output cleanly, separate from device hardware button steps.
• Mode Tabs & Action Button: Easily toggle between continuous playback (FREE-RUN), duration countdown (LIMIT), and wall-clock target (CLOCK). The large center button toggles START and STOP with live status reporting.

3. The Sound Engine & Noise Synthesizers

Unlike simple soundboard apps that loop compressed, lossy audio files with audible clicking artifacts, Seyethe Noise uses a real-time DSP synthesis engine:

• White Noise: Crisp and uniform across all audible frequencies. Best for masking sudden high-pitched noises and office chatter.
• Pink Noise: Equal energy per octave using multi-pole IIR filtering (Voss-McCartney method) and a gentle DC blocker. Ideal for reading and steady concentration.
• Brown Noise: Low-frequency emphasis modeled as an integrated random walk with 0.99 decay damping. Perfect for blocking traffic rumble and improving your sleep environment.
• Fan Simulation & Character Sweep:
  • Desk Fan (0% / Left): Higher pulse frequency (~60 Hz) and crisp airy breeze tone. Optimized for phone and tablet speakers.
  • Box Fan (100% / Right): Lower pulse frequency (~20 Hz) with deeper low-pass cutoffs and resonant hum for headphones and external speakers.
• Seamless Loop Synthesis: Whenever a slider is adjusted, the DSP engine bakes a continuous 30-second audio loop into memory using prime-number noise tables and a 500ms equal-power sinusoidal crossfade. During playback, the audio thread streams the buffer directly, keeping CPU utilization near zero.

4. Preset Management System

Store your favorite exact combinations of noise levels, fan character, and master volume across three dedicated preset slots:

• Loading Presets: Tap any populated preset slot (1, 2, or 3). The button flashes teal for 250ms, and all sliders immediately transition to the stored values.
• Saving to an Empty Slot: Adjust your sliders, then touch and hold an empty slot. A teal progress bar will fill the button with "SAVE?". After holding for 1.2 seconds, the slot saves, flashes "SET", and displays an illuminated LED bar.
• Overwriting & Clearing: Holding an already-occupied slot opens a safety confirmation modal:
  • OVERWRITE (Teal): Replaces the stored preset with your current configuration.
  • CLEAR SLOT (Coral): Erases the saved preset and reverts the button to an empty slot.
  • CANCEL (Slate): Closes the dialog and leaves the preset intact.
• Gesture Cancellation: If you change your mind while holding a preset button, simply drag your finger away before releasing. The progress bar aborts cleanly without saving.

5. Playback Modes & Timer Configurations

• Limit Mode Steppers: Tap -15, -1, +1, or +15 to adjust runtime in minutes. Tap RESET TO ZERO to clear. Tap START to begin (flashes coral if duration is 0m). Live stepper adjustments can be made while audio is actively playing.
• Clock Mode Targeting: Use the - and + steppers to adjust hours and minutes. Tap 12H / 24H to switch formats. The engine handles midnight rollovers automatically (e.g., setting 7:00 AM at 11:50 PM schedules a 7h 10m session).
• Tab Locking: While audio is playing, mode tabs are dimmed and locked to prevent accidental resets in dark bedrooms. Tap STOP to unlock and switch modes.
• 30-Second Gentle Fadeout: In both LIMIT and CLOCK modes, a linear gain attenuation begins at 30 seconds remaining, bringing volume down to complete silence at 0 seconds to avoid startling sleepers awake.

6. Battery Optimization & Overnight Setup

Mobile operating systems aggressively sleep background apps. To guarantee uninterrupted playback through the night, Seyethe Noise includes automated configuration guidance:

• Unrestricted Battery Mode: Setting the app to "Unrestricted" in your system battery settings ensures the OS will not suspend audio playback after your screen turns off.
• Android Setup: If optimizations are detected on first launch, tap FIX SETTINGS to open the system App Info page, select Battery, and choose Unrestricted. The Instructions screen will confirm BATTERY: UNRESTRICTED (GOOD) in bright teal.
• Deep Buffer Routing: On Android, audio streams via hardware deep buffers, allowing the device CPU to enter low-power battery-conserving sleep between buffer fills. When the screen turns off, UI rendering halts completely.
• Battery Benchmarks: In testing on modern devices starting from a 100% charge, an 8-hour continuous overnight session consumed just 18% battery on Android and 25% on iOS without being plugged into a charger.
• Bedside Recommendation: While designed for extreme efficiency, leaving your device plugged in overnight is recommended so you wake up to a full charge.

7. Diagnostic Logs & Power-User Tools

Access the built-in Diagnostic Suite by tapping the Help (?) icon in the bottom-right corner of the main deck:

• VIEW LOG: Opens a full-screen diagnostic reader displaying chronological callback events and performance metrics. Supports 2D scrolling and updates every second.
• DETAILS Logging: Tap the DETAILS pill to toggle low-level watchdog tracing. It logs callback execution times and OS audio dropouts (e.g., "ANDROID STOPPED US FOR: 150 ms gap"). Keep disabled for maximum battery savings.
• EXPORT LOG: Generates a clean text file in your public storage (e.g., Download/SeyetheNoise/Seyethe_Noise_Diagnostic_[Timestamps].txt).
• CLEAR LOG: Immediately wipes stored diagnostic logs from device memory.

8. About Screen & Transparency

Tap the Seyethe brand header at the top of the main screen to open the transparency view. It displays the version string, build timestamp (YYMMDDXX), our operational principles, and acknowledgments to open-source libraries (SDL2, NanoSVG, and Google Gemini product guidance).