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Spectrum Pad FAQ

Spectrum Pad - Audio Spectrum Analyzer App for the iPhone, iPad or iPhone Touch

Function Generator

To scroll around different frequencies, touch the graph and drag with your finger. Pinch to zoom in.

Tap on the Settings button to make these changes:

These can be turned on and off with the switches:

  • Fill Graph - fills in the entire spectrum in green, rather than just a single line
  • Grid display - adds X/Y grid lines
  • Logarithmic - plots the entire 10 to 20,000 Hz range with a log X axis

Tap on the number of FFT bins to change it, from 1024 to 262144, in powers of two.

Select the number of markers, from zero to five.

That's it!

If you are running iOS 7 or later, be sure to give the app permission to use the microphone. If you denied permission, you can always give it again by following these steps:

  • Open Settings app and go to "Privacy"
  • Select "Microphone" to get a list of all apps that have requested access to the microphone, and to control which apps have access to the microphone

Here are some details on directly connecting an audio line source to your iPad/iPhone/iPod Touch


Email your comments and questions to support@blackcatsystems.com

Last modified May 19, 2010