Developed by Andrew Smith

  • Category: Music
  • Release Date: 2009-01-22
  • Current Version: 6.1
  • Adult Rating: 4+
  • File Size: 24.42 MB
  • Developer: Andrew Smith
  • Compatibility: Requires iOS 9.0 or later.
  • App Ratings:
    4.5/5 ( 43 Reviews)
  • Price:
FFT App Ratings: 4.5
Based on 43 Reviews

FFT App Description

FFT is a high-resolution audio analysis tool for the iPhone and iPod touch. It uses the Fast Fourier Transform to analyze incoming audio, and displays a very detailed graph of amplitude vs. frequency. Use this app with the built-in iOS device microphone, or upgrade to our iAudioInterface2 or iTestMic for a complete professional solution. *** Designed for Acoustical Analysis This application has been designed for acoustics work, and so the bins have been normalized to octaves, to get a display that will show a flat line for pink noise. You can control both the level of graph smoothing and decay time, to get as much or as little detail as you require. You can also control the dB resolution of the graph, as well as the frequency range that is displayed. *** Includes Signal Generator Included in this app is the engine from our Generator app, which is a low-distortion, artifact-free signal generator. The signal generator appears as a heads-up display when you tap the icon, so you can see the graph while you adjust the generator. Generate sine waves, square waves (within limits), white noise, and pink noise, optionally in psuedo-balanced mode. All waveforms are generated in real time using high-precision algorithms. *** Cursor Readout Move your finger across the screen to get a cursor to read out exact dB levels and frequencies. *** Touch-GUI Controls Use a vertical pinch-open gesture to expand the dB scale. Use a horizontal pinch-open gesture to expand the frequency scale. *** Graph Smoothing Smooth the graph by octave, 1/3, 1/6, 1/12, or 1/24 octave. Adjust the decay time from 0.5 seconds, for a very fast fluid display, to 8 seconds, or use Peak Hold or Average mode. Average mode is a true equal-weighted average, which can run continuously. *** Peak Tracking Turn on Peak Tracking to have FFT automatically find a label the frequency of the highest peak on your graph. *** Tune the Parameters Set the FFT size from 4096 to 32k points (depending on iOS device) , or select Equal Points Per Octave mode, for high-resolution analysis, even at low frequencies. *** Calibration FFT comes calibrated for the typical iPad, iPod touch, or iPhone microphone, and you can adjust the calibration. Microphone compensation files tailored to each iOS device are automatically applied. *** Save and Recall When your analysis is complete, you can save the graph image to your photo roll to include in a report, or export the data in an XLS file. *** Display Multiple Graphs Show a recalled graph on the screen in a different color. *** Difference Mode Use a stored graph as a baseline that is subtracted from the current graph in real time. *** RTA or FFT? If you are wondering if you should download this app or our FFT app, check out our website, we have a page devoted to this topic. *** Other Audio Apps Also, check out our other great audio and acoustics apps: AudioTools, our premier suite of audio and acoustics analysis apps, SPL, SPL Graph, for recording SPL over time, RTA, RT60, Generator, and Speaker Pop.


FFT App Screenshots

App Reviews

  • Great app

    By Gerardo2068
    Help me set up my hi Fi stereo with just my iPad. Lots of options and easy to use!
  • Good App Gone Bad

    By fleahead
    Update Crashes every time. Deleted and re-installed. Same thing. Developer must not care about reviews. I hate to say anything bad about this app, because I use it all the time, but the new patch I just installed is buggy. It's crashed 3 times in about a minute. Every time you double tap the screen it crashes. I made a change in the options and it crashed. I ran my memory management app and it did the same thing.
  • Awesome

    By Aural DeLight
    Loved this app for a long time! Thanks for the 4" support!
  • Great app!

    By AcousticAnalyst
    Great app which is easy to use and I use quite frequently but I would like to be able to output and email fft data in a text column format or excel... Can you please include this enhancement? Thanks!
  • Brilliant

    By Akamba
    Far, far better than an RTA, and with a signal generator to boot. Super easy to use. I absolutely love this app!
  • Nice app. Would like to see...

    By JJmann
    Works as advertised. Nice online tutorial is available. Would really like to see two features added to make it less of a toy and more of a useful tool. 1) The ability to store the actual data and upload it to a PC. That is, not just a screen shot. 2) An A-weighted scale option.
  • AERCO mic preamps

    By Jerry in Austin
    EXCELLENT! Very nice to have 16 K points, good user interface. Be nice to clear display from front panel- say double-tap?
  • Useful Toy

    By madd skillzz
    First of all, if you use sound systems, buy this app. Even if you own top shelf gear like I do (2 TEF analyzers, SMARRT, B&K mics with calibrators etc) you will use this A LOT because it is in your pocket. I bought most of the Studio Six apps, and except for RT60 they are pretty handy. They do NOT take the place of real gear for a bunch or reasons like non pro connectors, poor dynamic range, lack of frequency extension, characteristics of the built-in iPhone mic etc., and the only archiving is saving a pic of the screen, and when you do that it doesn't show what settings you have selected for that measurement. I am hoping that the long promised external mic helps fix a couple of these items. Enough of the negatives...I use this app several times every day. If I had to give it back I would be bummed. Buy it.
  • Working awesome

    By chuysgarage
    Great Job excellent app Buy it 
  • Stop wondering and just BUY IT! Definitely worth it.

    By Take it from me
    Apps like this make an iphone worth owning. I am a pro sound engineer, I work a lot of different rooms. Believe the hype, this app is VERY accurate. The only place it needs improvement is in the sub frequencies (below about 150), but this is a limitation of the iphone internal mic-can't wait for the stereo mic these guys are making to release. BUY IT! You won't regret it.