Great app I will give a star for each point implemented: 1. Subtracting of pre recorded spectrum(e.g. noise) 2. Lower sampling frequencies(e.g. 4kHz, 2kHz) 3. Saving of spectrogram in text Or higher resolution image with time marks Other than that this app is much more accurate than tons of others I tested.
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.
Logarithmic scale is off The logarithmic scale feature which I paid good money for is not accurate. Middle C which appears a perfect 262 hz in the linear version appears to be 200hz or so. Also you cannot rescale to limit the plot to a particular octave. I want this app to be able to tell me which notes are being played in a piano chord, but I cannot trust the scaling - please fix this before I up my rating. It would also be a great help if you could rescale in musical notes, so that you can clearly see which notes are being played
Unfinished feel. Great idea mediocre implementation. Set an option you phone doesn't support and it'll not work... Restart the program before changing it back and you get an "unsupported configuration" error and an instant quit, making it then unusable.
The basics are great, range zooming very bad. It kind of works, but in an unpredictable way...you have to randomly mash your finger on the amplitude and frequency scales until something useful hopefully appears. 5 star app with range scaling fixed, particularly with numerical input. FFT works great, very fluid.
Free version is just as good. I loved the free version, but the pro version is not worth what I paid, and there is no refund. If it had more options for LOWERING the sample frequency not just raising it, I would give it four or five starts. Not enough options to make it worth the money. Stick with the free version.
- 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!