A perennial problem with FFT-based analysis of audio data is that the frequency data points in a Discrete Fourier Transform (DFT) are spaced linearly, Older versions of smart used a fixed size, rectangular moving average – basically a FIFO average turned sideways – for smoothing transfer function data but this
On a smoothed transfer function trace,Įach data point is averaged together with some number of the immediately adjacent points on either side. "jagginess" on transfer function traces and can make trends in the frequency response of the system under test easier to see. Smoothing is essentially another type of averaging that is available only for Transfer Function displays (Phase or Magnitude). Introduction au Concept de Mesure > Lissage des Données de la Fonction de Transfert
Add iAudioInterface2 or iTestMic to make a complete professional-grade audio test & measurement system.Lissage des Données de la Fonction de Transfert It does not work on versions of Smaart prior to 7.3.If you are looking for a Spectrum Graph or Transfer Function that runs natively on your iOS devices, see our app, AudioTools, which has Smaart Tools I (single channel) and Transfer Function available for in-app purchase. Use the + and - buttons to adjust the delay time, and view the results in real time.Walk the venue, and take Smaart 7 with you.NOTE: This app does not process audio, and is only useful if you already own a license to Smaart 7.
Now you can operate Smaart 7 running on your PC or Mac computer from your iOS device, and view measurement results right on your iOS device screen.Connect to Smaart 7 (v7.3 or later) over WiFi, and then select any measure from any group, including Spectrum and Transfer Function displays.View the spectrum plot in single screen or split screen mode (on iPad only), so that you can see RTA and Spectrograph at the same time.The Transfer Function graph shows the magnitude, phase, and coherence plots, with an advanced touch-GUI available.Bring up the Delay Finder to measure the delay, and apply it, all without touching your computer.
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