iAnalyzer

Few purchased iPhone apps exceed my expectations for value, this one ranks at the very top

What this app can do is really incredible: * Temporarily store and playback sound with very low latency * Analyze the frequency content of incoming or recorded sound with either an FFT or octave analyzer, in 2D or 3D * Zoom to any point in a recording to bring back the waveform and frequency content There are some graphical rough edges, though. When using the mix mode, with Auto-Peak tracking, the labels obscure the waveform view. Touching the FFT waveform brings up an info box at the top, so you can see the frequency, dB and musical note of the selected region. Very useful. A nice touch is, if you have peak-track mode on, the info box will be highlighted if you roll over a peak. Overall, a technically very impressive app. Things I hope are fixed in the future: * Graphical refinement. The data itself is quite beautifully plotted, but the framing choices are not as appealing. * Zooming in the bottom pane. If I record a very long segment of data, it is difficult to get back to the beginning. * Improved responsiveness with higher FFT sizes, although this is likely a limitation of the hardware, and not the software.

IAnalyzer is an outstanding audio spectrum analyzer app with several unique features. IAnalyzer not only shows the spectrum of a sound, with the frequency and dB indicated, but it also identifies what musical note the loudest peaks are close to, and how many cents sharp or flat these peaks are. This is extremely useful for tuning / manufacturing complex musical instruments where the harmonics of the note need to be tuned along with the fundamental. IAnalyzer is also unique in its ability to record a sound and freeze the action during playback so that the details of the sound spectrum and it's harmonics can be examined. You drag the recorded sound track forward and backward on the bottom of the screen with your finger while examining the detailed audio spectrum of the sound on the top half of the screen. This feature is extremely helpful when trying to examine very transient sounds like the sound of a Mallet hitting a marimba key, or "tap tuning" a marimba resonator. It allows you to examine the attack and decay of the sound as a whole, as well as the behavior of the individual harmonics. Most music instrument apps fail to lock in on very brief percussion sounds, and I have not found another audio spectrum app that combines the ability to freeze the action of percussion sounds while also identifying the musical notes for the peaks that appearing the sound spectrum, I have many different musical instrument tuner apps, but iAnalyzer has become my "go to " app for tuning mallet instruments and their resonators.

Exceptionally well-done implementation of FFT. The audio recording and IP connection is a cool feature. A few suggestions: on my iPad, but not on my iPhone, I get a strong spike at 8597 Hz -- not sure of the source. When displaying multiple peak boxes, I'd prefer if the boxes did not "bounce," and possibly move the boxes up a bit (on the iPad), just under the freq. axis. Linear/log axes choice would be nice. The dB values seem unusually large. Freq. spacing seems tighter than Fs/N would predict -- wonder how you are doing that (it's nice, though). In some cases even a longer time frame might be nice. Can't delete a lone file in edit mode -- I have to create a new one first. An idea for a feature: a moving average of the spectrum over time. It would cause strong components to be reinforced and noise would diminish. In the text file, perhaps you could include frequency in addition to harmonic number. Great job -- beautiful display. High quality implementation. I tried the free version and was impressed. But the extra features of the "pay" version are worth the $19.99, for me.

After yrs of use, the audio has been disabled. How come ?

Very practical app and elegant graphics. I would like to see the dB vertical scale as we can see the horizontal Hz scale. I hope it will also work with the USB line/mic in and more important, be able to insert recorded wav files so that one can check his recordings. Without those possibilities, it is too expensive for what it does right now. Please update !

After having paid for the app with full features in the pre “pro version” past I have lost features due to an “update” download. I'm presently being extorted to pay for features I had paid for and have been deceived into losing. Other than that…

To the developer, since the subscription, There is this strange notch filtering that won’t go away. The app is great when it’s working but this notch filtering renders it useless.