FreqForge

FreqForge is a precision tone and frequency generator designed for musicians, audio engineers, scientists, and hearing researchers worldwide. Built with an oscilloscope-inspired interface and real-time waveform visualization, FreqForge feels like a real signal instrument — not just another basic app. ━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎛️ CORE GENERATOR ━━━━━━━━━━━━━━━━━━━━━━━━━━━ • 4 waveforms: Sine, Square, Triangle, Sawtooth • Full hearing spectrum: 20 Hz – 20,000 Hz • Logarithmic slider — pitch feels natural as you sweep • Fine-tune: ±0.1 / ±1 / ±10 / ±100 Hz nudge buttons • Octave jump: ×½ down, ×2 up • Tap the frequency display to type any exact value ━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📡 OSCILLOSCOPE DISPLAY ━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Real-time waveform animation • Neon glow trace on playback — the instrument feel • Animated waveform scrolls with frequency ━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔊 DUAL TONE MODE ━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Two independent channels, A and B • Play two frequencies simultaneously • Perfect for binaural beat research and intermodulation tests ━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📉 SWEEP MODE ━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Sweep from any start to end frequency • Logarithmic sweep (natural) or linear • Adjustable duration: 1–60 seconds • Real-time progress bar with current frequency readout • Perfect for: room acoustics, speaker response, hearing range tests ━━━━━━━━━━━━━━━━━━━━━━━━━━━ 💾 PRESETS ━━━━━━━━━━━━━━━━━━━━━━━━━━━ • 10 built-in reference frequencies: A4 440 Hz · C4 261.63 Hz · 40 Hz Gamma · 100 Hz Bass 1 kHz Reference · 10 kHz High · 20 Hz Sub-Bass 432 Hz Natural · 528 Hz Solfeggio · 7500 Hz Tinnitus Ref • Save unlimited custom presets • Quick-access preset strip on the main screen ━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎧 BACKGROUND PLAYBACK ━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Tone continues when you switch apps • Persistent notification shows current frequency & waveform • Stop instantly from the notification bar • Audio focus management: pauses during calls, resumes after ━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚙️ OTHER FEATURES ━━━━━━━━━━━━━━━━━━━━━━━━━━━ • No ads · No analytics · No internet required • Keep screen on during playback (optional) • Toggle oscilloscope display on/off • 11 languages: English, 简体中文, 繁體中文, 日本語, 한국어, Deutsch, Français, Español, Português, Русский, العربية ━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚠️ HEARING SAFETY ━━━━━━━━━━━━━━━━━━━━━━━━━━━ FreqForge can produce continuous tones at any frequency and volume. High volumes can damage hearing. Always start low and test comfortably. FreqForge is not a medical device and is not for clinical use. ━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHO USES FREQFORGE? ━━━━━━━━━━━━━━━━━━━━━━━━━━━ Musicians: Tune instruments to any reference pitch Audio engineers: Test speakers, amps, and room acoustics Scientists: Frequency-specific experiments Students: Explore acoustics and psychoacoustics Curious users: Discover the limits of human hearing Tinnitus sufferers: Match and track tinnitus frequency