Hysteric Oscillator 波動

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Everyone
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About this app

An oscillator experiment app that shows the waveform in real time while it plays.

Generate sine, square, pulse, sawtooth, and noise from 2 Hz to 20 kHz, and control the filter (low-pass / high-pass) and AM / FM modulation from your device. Export what you made as a video or an audio file. Useful for quick speaker and amplifier checks, DIY audio circuit tests, and learning synthesizer basics.

Features
- Six waveshapes: sine, square, pulse, sawtooth, harmonics, and noise (White, Pink, or Brown)
- Real-time waveform display with L / R in separate colors; tap to switch to a mono trace
- Spectrum analyzer: see the frequency content in real time, with guide lines on each harmonic so you can read how much harmonic content the sound has
- "Harm" waveshape built from added harmonics: pick which harmonic is loudest with a slider, then set the character with Pure / Full / Odd / Even, and check the result in the spectrum
- Frequency from 2 Hz to 20 kHz, with exact numeric entry
- Filter: off / low-pass / high-pass, with resonance (Q) and slope (-12 to -48 dB/oct)
- AM modulation with five modulator shapes; pulse lets you set the beep length in milliseconds
- FM modulation with five modulator shapes: vibrato, trill, siren and hiccup-style pitch movement
- Stereo balance control
- 39 built-in presets (bandwidth-check sine tones, filter and pulse driven effects)
- Export a vertical video (MP4) of the moving waveform for social media (free)
- Export audio files (WAV / M4A) with the Full Version
- Two channels for interference and beating (Full Version)
- Save and share your own presets (Full Version; the same file format as the iOS app, so presets travel between devices)

Great for
- Quick checks of speakers, earphones, and amplifiers
- Testing DIY effects pedals and audio circuits
- Learning waveforms, filters, and modulation
- Classroom and workshop demonstrations
- Playing with drones, beats, and modulated tones

Free and Full Version
The oscillator, waveform display, filter, modulation, numeric entry, and video export are free. Two-channel operation, preset saving and file sharing, audio file export, and alternate app icons are available through a one-time in-app purchase.

Note
This app is intended for experiments and quick checks, not precision measurement. Start at a low volume, and take care when connecting earphones, headphones, or external speakers.
Oscillator with a live waveform view, for audio experiments and gear checks.
Updated on
Aug 12, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    App activity and Device or other IDs
  • Data is encrypted in transit
  • Data can’t be deleted

What’s new

• Added a flanger. Sweep the notches with the FM Depth and Rate sliders.
• Added German, French and Traditional Chinese.
• You can now switch the app language in Settings.
• The app icon has changed. Switch back in Settings > Appearance > App icon.
• The preset list now opens scrolled to the preset you are using.
Content rating
Everyone
In-App Purchases
Learn more

App support

About the developer
新井敏彦
i.officearai@gmail.com
志茂5丁目5−4 601 北区, 東京都 115-0042 Japan

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