bytes into text ( for ID3 tag reading??)

rest of the bytes will be details about the song. i can check if the "ID3" is there, and it goes into a loop for me but when i read the rest of the bytes, all i get is numbers. eg string result = ""; for(int i = 0; i <= 127; i++) { result = result + byteArray[i]; } result will only be equal something like "4124531065432107808949040984098409419". if i read the data into a char variable, i get the variable = a square ( i dont know which keys produces a square, sorry). anyway, my question is , when i have a byte array, how do i take it and turn the data in it into a readable string?