Function Generator

Dual channel function generator for the audio output.

Function Generator

App stats

By: keuwlsoft
Version: VARY (Last updated: 2024-02-08)
Creation date: 2014-03-28

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App summary

Dual channel function / waveform / signal generator for the speaker / headphone audio output.

Output is 16 bit for each left and right channels and at 44.1kHz. Output will depend on your device hardware. Some device hardware may may filter out the DC bias and low frequency signals. At high frequencies, the waveforms will be distorted due to limited number of samples for each waveform (for example at 4.41kHz, a sine waveform will be approximated by only 10 points). Therefore this is for fun/educational use, for critical applications use a real calibrated function generator.

Left and Right audio channels can be assigned to either channel 1 or channel 2.
Sine, Square & Triangular waveforms.
Frequency range from 1 mHz up to 22 kHz.
Amplitude as percentage 0-100%.
Set duty for square waveforms or skew triangular waveforms to get saw waveforms.
Offset the phase of waveforms.
Sweep frequency or amplitude (Single, Repeat & Bounce modes).
Amplitude Modulation (AM).
Frequency Modulation (FM).
Burst mode for a specific number of waveforms (1-10000).
White noise & pink noise Generator. Pink (1/f) noise falls of at ~3dB per octave between 43 Hz and 44 kHz.
Memory slots to save & recall channel configuration.
Select values with spring slider or number pad.

More detailed explanation available on website

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Google Play Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Excellent function generator capabilities and versatility.
  • Free to use with no ads.
  • Allows precise frequency adjustments.
  • Useful for audio testing and analysis when combined with other apps.
  • Simple to use once familiar with the interface.
Cons
  • User interface can be confusing initially.
  • Output does not persist when the screen turns off or when switching apps.
  • Lack of higher sample rate support.
  • Issues with stereo sound generation on certain devices.
  • Need for options to synchronize settings between channels.
Most mentioned
  • Confusing user interface.
  • Output not persisting when screen is off.
  • No ads, making it free to use.
  • Versatile and useful for audio testing.
  • Desire for background operation and synchronized controls between channels.
User reviews
Excellent simulation of a two-channel bench-type function generator. I've used it for testing audio equipment in conjunction with other test equipment. Very versatile capabilities once you get used to the UI...all buttons on-screen. Be aware that signal levels may get high enough to damage your phone's analog output circuitry if you use a 3.5mm headphone jack. I accidentally did this to my old phone, trying to drive a low impedance load...left channel became permanently distorted. Dumb mistake
by Duncan Porter, 2024-11-21

This is the first app that lets you tune frequencies to a higher degree than a single hz this is fantastic for rifeing and binaural beats. So far this is the only app I found that lets you tune it in this way. I'm very happy with this app although the user interface leaves things to be desired. The tuning bar is the most important thing in this app as well as the AM tuning
by Matthew, 2024-11-14

My only gripe is that the output doesn't persist when turn the screen off. Kudos on the price and zero permissions. I would allow a permission if needed for screen off sound from this app though
by Robert F, 2024-10-18
View all user reviews

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