Creating a visual spectrum android application

Question

I'm trying to make a sound spectrum visualizer something like this:

I already have an AAC player that connects to the audio stream and plays music. How to add visualization component now?

Answer 1

If you are talking about the spectrum of an audio frequency spectrum, you can take the following steps:

• Converting audio data to raw audio format, such as 16-bit PCM (possibly on Windows if you use a stream)
• Use a fast Fourier transform library such as JTransforms to calculate the frequency spectrum from your window.
• Visualize an array containing spectrum values