Good app Very nice app. One thing lacking is the ability to play in background and or with screen off which would be nice if u intend to use for infinite hours data grinding the whole audible spectrum indefinetly and then some, guess ill have to get a another phone exclusively for this app. I love the sweep feature. The burst feature is a little time consuming to use. Very education useful helpful fun app A++
Not a bad little app but limited by your phone's capabilities. I ran a fast fourier transform on the initial 440hz sine wave that's programmed into it and no matter the averagong factor I used, it always showed as 439hz. Like I said though not bad. I've gotta play with it some more and see how far these limitations go. Great software, just not well suited for most phones. Especially love the lack of ads or freemium content. That got it the extra star.
Works great for my purposes. Here are my few observations. I've built a microphone opamp circuit to pick up the sound wave from this app. Sinusoidal signal passes really well, square and sawtooth signals barely recognizeable. It was expected, because the signal has to pass through the smartphone speakers, then through the air, the microphone and my circuit. If I connect the outputs directly to the oscilloscope, all signal shapes can be easily recognized. The frequency was not very stable, jittered around +- 3Hz, but that was good enough. The amplitude noticeably rises with the frequency. This can be heared by ear.
You're kidding, right? Works perfectly, free AND no ads? This app breaks the infamous "Pick Two" rule of mobile apps! As an avid amateur electronics DIY'er, this app does everything I need it to for my projects and more without needing to buy a $6 million signal generator to take up space on my workbench. Did I mention it's free and has no ads? I did? Good, well, I said it again. You guys are awesome.
Best function generator I could find Pros: dual channels, lots of options (including duty cycle); cons: can be confusing (sometimes I have to reset the app in order to make it play again), controls small. It would be nice if it was a bit more phone and user friendly.
Pretty good for just basic stuff. I tested it on an oscilloscope and found that the sine wave was good up until 20khz, triangle was good until about 1.5khz(after that it look like a sine wave), and unfortunately the square wave, looked pretty horrible at any frequency. Can't really blame the app for that, more of a problem with the mobile device. Overall it's a good app.
Added settings (cogs button top left) - Frequency, Amplitude, Phase and Duty Resolution can now be changed. Settings also has a soft turn on/off option to avoid those annoying 'clicks' . Added a short user guide (i button top right). Plus a few more minor tweaks/fixes.
Frequency Sound Generator - waveform audio signal generator/ function generator