[Help]Reading Audio datas in a player

Hi,

I’m trying to make an audio player and someone says Juce is good at programming audio tools.
With referring to the juce demo, I can now playback mp3.
In order for some filtering functions, eg. Eq, can someone show me the generic way to get audio samples in JUCE programming?

(make a subclass of AudioTransportSource?..I wonder)

thx.