Information about stored data

Hello,
I need to know what are the values that are stored in the SRAM, I know that is the voltage, but does the values have any relation with the sound wave?
I’m asking this because I need to use that values to identify steps with a Neural Network, and when I saw the values are always two values changing.
So, there is any way to get the values of the wave or anything like that?

Here is my code:

#include 





int lectura = 0;



unsigned int sampleRate;

unsigned int playbackBuf = 128;

volatile unsigned int tCycles;

unsigned int passthroughSampleRate;

unsigned int recordingSampleRate;

unsigned int playbackSampleRate;

volatile unsigned int timer1End;

volatile unsigned int timer1Start;

unsigned int readBuf[2];

int currentA0Position;

boolean evenCycle=true;

volatile byte writebuffer;

volatile long address = 0;

volatile long endAddress = 0;

volatile byte chipAddress=0;

volatile unsigned int mode=0;

volatile int aux = 0;

void setup(){

Serial.begin(9600);

sampleRate=18000;

timer1Start = UINT16_MAX-(F_CPU/sampleRate);

AudioHacker.begin();

}



void loop(){

evenCycle=!evenCycle;

if(aux==1){

Serial.println("Grabacion completada");

int x=0;

int y=0;

for(x;x<3;x++){

for(y;y
AudioHacker.readSRAMPacked(x,y,readBuf);

Serial.println(readBuf[0]);

Serial.println(readBuf[1]);

}

}



}

}

ISR(TIMER1_OVF_vect){

TCNT1=timer1Start;

byte signal;

if(mode==0){

signal=AudioHacker.readADC();

if(evenCycle){

writebuffer=signal;

}

else{

AudioHacker.writeSRAMPacked(chipAddress,address,writebuffer,signal);

address+=3;

if (address > MAX_ADDR) {

if (chipAddress == 0) {

// proceed to the second SRAM chip

address = 0;

chipAddress = 1;

}

else {

mode=1;

aux=1;

}

}

}

}

if(mode==1){

}

}