Increase number of I2S audio streams?

[WMXZ]

The current code im using is:
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>

// GUItool: begin automatically generated code
AudioInputI2S i2s1; //xy=346,91
AudioOutputUSB usb1; //xy=530,91
AudioConnection patchCord1(i2s1, 0, usb1, 0);
AudioConnection patchCord2(i2s1, 1, usb1, 1);
// GUItool: end automatically generated code

void setup()
{
AudioMemory(8);

}

void loop()
{
}

I cannot see anything obvious in SW, in fact I just tried it and it is working for me. So, I conclude your HW setup is not correct. Can you provide pictures of your setup?