Posts Tagged ‘FFT’

Cutting Your Teeth on FMOD Part 6: Recording and visualizing sound card output

November 24, 2013 11 comments

In this article, we’ll take a look at how to intercept and record the output from a sound card. Our primary focus here will be to create a visualizer that reflects the output sound using the frequency analysis technique discussed in part 4, however you can of course use the recording code for any purpose you wish.

I won’t go into the details of FFT frequency analysis here (see part 4 for that); we’ll just look at how to capture the real-time sound output then provide the visualizer as a usage example. Read more…

Cutting Your Teeth on FMOD Part 4: Frequency Analysis, Graphic Equalizer, Beat Detection and BPM Estimation

January 16, 2013 36 comments

In this article, we shall look at how to do a frequency analysis of a playing song in FMOD and learn how to use this as the basis for a variety of useful applications.

What is frequency analysis?

Note: The SimpleFMOD library contains all of the source code and pre-compiled executables for the examples in this series.

Frequency analysis is where we take some playing audio and identify the volume level of each range of frequencies being played. In a simple example, this lets us identify the current volume of the bass, mid-range and treble in a song individually, or any other desired range of frequencies. Read more…

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