Function Generator

4.4
8.1K reviews
1M+
Downloads
Content rating
Everyone
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About this app

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
Updated on
8 Feb 2024

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 info and performance
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.4
7.19K reviews
Duncan Porter
21 November 2024
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
1 person found this review helpful
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Matthew
14 November 2024
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
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Robert Powell
7 September 2024
It is to work good in the old days. But one of the updates the channel One controls the left and right audio now. I have used these signal generators both professionally and on my phone. The one on the phone however doesn't work anymore. Still makes a tone. But not a stereo tone. Am I being helpful if you want mineral.
4 people found this review helpful
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What's new

v1.42 Updated to use newer code libraries to better target and run reliably on devices in 2024.