Creating Echo Effect without Minim

sui1g3

I am trying to figure out how to create echo effect without using Minim library.

Echo is a repeat of the sound after short time, however i dont know how to translate this to code.

I want to manipulate the channels, but i dont know what to do after this:

songSample = minim.loadSample("song.mp3");
leftChannel  = songSample.getChannel(songSample.LEFT);
rightChannel  =songSample.getChannel(songSample.RIGHT);

format      = new AudioFormat( 44100,16,  1,  true,     true);  

float[] leftChannelDelay = leftChannel;
float[] rightChannelDelay = rightChannel;

I appreaciate any help.

Thanks