Great tool Helped me identify the charger in my room emitting a high pitch electrical whine. The price of the app was reasonable for a good nights sleep :-)
'grebe52 using Galaxy S2 Works well with Android 4 on Galaxy GT-19100. I've been working on birdsong, and this application produces a decent and useful image of the analysis of the song, say, of a Blackbird (European), detecting frequencies well-beyond my (ageing) ears. It will also detect Bat echo-location signals. As an retired physicist I find this device incredible, when I recollect the amount of kit such as the CROs, mics, amplifiers, which was needed to do such an analysis years ago. I can sit in the garden and 'watch' the birdsong, with one small smartphone! It has also been useful in looking at the overtones emanating from a Tibetan Singing Bowl, and likewise by Mongolian Throat Singers. The fun is endless! A labelled y-axis would be a refinement. Nevertheless, an excellent application.
The benefits of the paid version over the free version aren't worth the cost. The app works well, but for paying what I did for this app, there's a couple features I'd like to see that are missing: -Screen rotation (I apparently like to put my tablet opposite how they expect, and their app refuses to rotate/flip from its default orientation) -More frequency selection, or zoom (as a person with a low voice, all of the frequencies I'm interested in seeing are typically crammed into the bottom third of the screen, even with it set to show those as much as possible) -Ability to record a long sequence of audio, play it back, pan through the output, save (and not just a screenshot, but actual audio), and maybe even view spectrums for audio files. Basically, more than just 'what is coming in the mic this very second'
Really needs X-axis labels… This app really needs time labels along the X axis. Other than that, I am quite impressed. My background in acoustical analysis would make this of interest to me, but I think even those without such a background would have to find this very cool. I have a memory, from more than a quarter century ago, of being shown a waterfall plot, and hearing the sound that was represented, and having a light go on in my head about the relationship between what I was seeing and what I was hearing. Back then, it took the better part of an hour for a pen plotter to draw the waterfall plot that I was shown. I can imagine people today, watching this app on their phones in realtime, and having the same epiphany that I had back then. About twenty years ago, I wrote a program like this to run on an MS-DOS-based computer, in realtime. Back then, it took a specialized digital signal processor to handle doing the FFTs fast enough to make this possible. Isn't it amazing how far the technology has advanced, since then, that this can now be done in a small, common, handheld device.
Don't buy the full app stick with the free one I thought the free app was good. I kicked myself for forking out for the full version. Random signals and differences between devices asked for help was told to calibrate? Sent images of faulty traces but no reply since then. In short for me poor support, over priced app with very little extra for paying full price. Use the free one and stay happy.
Cool! Does one thing and does it very well! (Just used it to find the frequency I sing at, and the frequency I whistle at.)
- Native support of large screens and tablets
- Works on Android 3.x
- Measurement added, activate in options
- Save spectrogram to sd-card
- support fo sd-install
- crash when pausing app fixed
Thanks for all the feedback!