This allows for high precision and flat frequency response, as well as for stereo input. For best results we recommend using a calibrated measurement microphone connected via USB audio interface or iPhone dock connector. Larger FFT Size also provides better low-end frequency representation.Īudio input may be acquired via the built-in microphone or an external measurement microphone. The more accurate the frequency resolution (larger FFT size), the less accurate the time resolution and vice versa.įor rapidly changing material such as music and speech, FFT size of 2048 or 4096 and averaging set to Fast or Medium will do fine.įor test signals, such as pink noise and constant frequency tones, a larger FFT (8192 or 16384) with Slow or Infinite averaging works best. Several Color Palettes are available suiting different applications.Ĭhoosing the right FFT Size and Time Averaging is always a trade-off between time and frequency resolution. Options include Decade or Linear Scale, Speed, and Gain adjustment. It can be used to reveal images "hidden" in sound. Spectrograph module plots frequency over time spectrograms of surrounding sounds, music, etc. Again, Cursors, Peak Tracking, and dB offset are supported, as well as input channel selection.
Options include FFT Size, Averaging Mode, Logarithmic or Linear Frequency Scale, and FFT Window function (Hamming, Blackman, or Rectangular). It is useful for detailed analysis and isolating particular frequencies. Other configuration options include: FFT Size, Time Averaging/Decay Mode, and Peak Tracking.įFT module plots real-time raw spectrum graph. Two graphics modes are supported: Classic mode, where bands are drawn as simple bars and Modern mode, where the whole spectrum is represented by a colorful analog graph (continuous visible light spectrum from red to violet). It supports ISO Octave bands from Full to 1/6 Octave. Octave RTA Splits the audible range into frequency bands.
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