JGFFTViewerEx enables you to simply analyze the sound and the content of a wave file on the iPhone by capturing and saving it around you. With the recorded sound, you can play it and understand what the natural world you are hearing is using FFT graph and waveform.
Using the recording functionality, you can save the wave file which has the PCM format and the maximum time of continuous recording is 5 minutes.
The stopped wave file is saved automatically to the list of sound files.
To capture sound, tap the record button in the center part of the screen to start recording. When youd like to stop recording, tap the same button again.
After you capture your sound, you can start playback by tapping the play button to the right of the record button immediately or by selecting one saved file in the list of wave files.
The list of audio files will appear when you tap the button displaying three minus signs, which can be found on the bottom left of the waveform.
A timer at the lower-right part of the waveform indicates how long your recording or playing session is lasting and the current playing or recording position of total duration of the wave file.
To play the recorded sound, tap the play button and if you tap the button again it will stop playing the sound.
The tracing functionality gives user ability to analyze the frequencies and the waveform of the specific position that shows where the sound file is tracing by dragging the waveform using your finger.
The left-hand side of the waveform is starting position relative to its overall wave files length in scrolling the FFT graph and the waveform.
When you want to return from the tracing mode to the measuring state, tap the return button in the center left of the screen. In the measuring state, the return button is invisible.