Tone Generator: Sine Wave

Global Utility App Maker

Contains ads

About this app

Tone Generator is the most accurate audio frequency generator, sine wave oscillator, and signal generator for Android. Generate pure tones from 1 Hz to 22 kHz with sine, square, sawtooth, and triangle waveforms, frequency sweep, and dual-tone output — replace expensive lab equipment with the phone you already carry.

▶ MAIN FEATURES
• Sine, square, sawtooth, and triangle waveforms
• Full 1 Hz – 22 kHz frequency range with 0.1 Hz precision
• Frequency sweep mode (rises or falls over time)
• Dual-tone and stereo output with independent channels
• Adjustable volume and left/right balance
• Precise frequency entry by slider or number
• Function generator and signal generator in one app
• Speaker, subwoofer, and hearing test tones
• Dark mode for studio and night use
• Works fully offline — no internet required

▶ HOW TO USE
1. Pick a waveform (sine gives the cleanest pure tone).
2. Set the frequency with the slider or type an exact value (e.g. 440 Hz).
3. Adjust the volume to a safe, moderate level.
4. Tap Play — the tone outputs instantly.
5. Use sweep or dual-tone mode for response and channel testing.

▶ WHO USES TONE GENERATOR
• Audio and AV engineers calibrating systems
• Musicians and instrument tuners working to exact Hz
• Speaker and subwoofer testers checking drivers
• Electronics hobbyists testing circuits and filters
• Science and physics students exploring sound and frequency
• Hearing-range testers generating reference tones

Use a moderate volume to protect your hearing and your speakers — high-frequency tones at high levels can cause damage. Start low and increase gradually.

What’s new

Rebuilt audio engine: reliable playback on all devices, true stereo/binaural beats, new triangle wave + pink/brown noise, click-free start/stop, sleep timer (15/30/60 min), note stepper. Works with silent switch.