![]() TODO - Convert FFT data into 20 "bands" We must divide by 32768 before we cast to Double.įftSamples = (double) sData / 32768 As a double is only 2 bytes (values -32768 to 32768) IMPORTANT: We cannot simply cast the short value to double. Convert sample data from short to doubleĭouble fftSamples = new double Int result = audioRecord.read(sData, 0, BufferElements2Rec) ĭoubleFFT_1D fft = new DoubleFFT_1D(sData.length) I am using Wendykierp JTransforms library to perform the FFT calculations, and have managed to capture audio data and execute the FFT functions. Here is the version I was able to successfully make on iOS: Tap in the scroll bar area(bottom of screen) to re-seek the current position.I am building an app that needs to be able to display a real-time spectral analyzer. Touch and move in the summary waveform area to move the current position. Touch and move in the result area with 3 fingers to rotate the 3D graph. Touch and move in the result area with one finger to use the measure line. Press "File" button to see the HTTP address, it is in the bottom of the window. The internal mic of iPhone first generation can only works on 8K sample rate, you need head-set to achieve 44k. You can also change the position while playing. ![]() Move in the waveform area or touch on the bottom of the area to change the current position, iAnalyzer re-compute and update graph automatically. Touch in the result area to use the measure line, bordered label means where is a peak. Wifi Transfer and Data exporting: Download wav files with your browser, including screen shot, FFT result in txt file. File Manager: Recording in wave format, create new files, delete exist files, etc. ![]() Snap to Peak: Find peak more easily while using measure line. Oscope Auto-Scale: Enable you to view more details for low level signal. Record at any position and red color to mark the latest recording, unlimited recording time. Current waveform display and summary waveform display. (iPhone 4, iPod touch 4 and iPad required) Sync display on your device and extern screen. (Require iPhone 4S and later, iPad 2 and later which shipped with multiple cores processor.) With this feature, you can listen to your recoding very slowly. Powerful synthesizer to allow you replay the audio with different speed, from 1/8 to 4x. ![]() Frequency to music scale converter, you can use iAnalyzer as a professional instrument tuner, or to test if any sound is tuneful. Auto peak frequency tracing, up to 3 peaks can be displayed simultaneously and each one be linked from text to the graph clearly. High precision peak frequency computation, average-error lower than 0.1%. History result display while in 3D mode. FFT spectrum, Octave and 1/3 Octave result display. Works on 44K sample rate, 20~20k Hz frequency output. High performance software design for Real Time Analyzing(RTA) and complex graph displaying. We also released the Mac version, you can download it from "Mac App Store". This is definitely a Must Have app for every musician or sound engineer. IAnalyzer is a FFT based professional software to analyze the audio signals for iPhone, iPod Touch and iPad.Īfter 10 years of good sales all over the world, we are glad to see that iAnalyzer has gradually become the industry standard in audio analyze field, due to it's very high quality of course.
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