DE1 AUDIO CODEC help needed

[Altera_Forum]

Hello, 

 I am using DE1-SOC audio codec. I have sound by linking ADCDAT to DACDAT. I do this with a switch. So I can disable sound or listen to it by using this switch.  The next step is to make a 24 bits left and right data from ADCDAT and then manipulate it and get it back to DACDAT. So I made 2 processes:  The following converting ADCDAT to 24 bits data left and right  PROCESS(BCLK,NRST)      BEGIN  if NRST = '0' then  AUD_DACLRCK_OLD <= '1';   GO <= '0' ;  index <= 0 ;  ch <= 0;  temp <= conv_std_logic_vector(0, 24) ;  elsif rising_edge(BCLK) then  if AUD_DACLRCK_OLD = '1' AND AUD_DACLRCK = '0' then  ch <= 1;  AUD_DACLRCK_OLD <= '0' ;  index <= 24;  end if;  if AUD_DACLRCK_OLD = '0' AND AUD_DACLRCK = '1' then  AUD_DACLRCK_OLD <= '1' ;  ch <= 2;  index <= 24 ;  end if;   if ch = 1 then   if index >= 0 then  temp(index) <= AUD_ADCDAT ;  end if;  index <= index - 1 ;  if index = -1 then RES_LEFT <= temp(23 downto 0) ; ch <= 0;end if;  end if;  if ch = 2 then   if index >= 0 then  temp(index) <= AUD_ADCDAT ; end if;  index <= index - 1 ;    if index = -1 then RES_RIGHT <= temp(23 downto 0) ; ch <= 0; end if;  end if;  end if; --rising_edge    END PROCESS;  For getting it back to 1 bit:  PROCESS(BCLK,NRST)  variable i,j : integer;  BEGIN  if NRST = '0' then  i := 0; j := 0;  LR <= '0';  GO <= '0';      elsif rising_edge(BCLK) then  --if rising_edge(START) and GO = '0' then   AUD_DACLRCK_OLD <= AUD_DACLRCK;  if AUD_DACLRCK_OLD = '0' AND AUD_DACLRCK = '1' then  ch <= 0;ch2 <= 1;   data_left <= datain_left;  data_right <= datain_right;   j := 24 ;   end if;   if AUD_DACLRCK_OLD = '1' AND AUD_DACLRCK = '0' then  ch <= 1; ch2 <= 0;  i := 24;  end if;  if (ch = 1) then   if i >=0 and i <= 23 then AUD_DACDAT <= data_left(i) ;end if;   i:= i-1;  elsif (ch2 = 1) then   if j >=0 and j <= 23 then AUD_DACDAT <= data_right(j) ;end if;   j:= j-1;  end if; --GO  if i <0 then ch <= 0; end if;  if j <0 then ch2 <= 0; end if;  end if;    END PROCESS;     So if I connect ADCDAT to DACDAT I get perfect sound. But if I do it as above I get too much noise.  Any idea? I appriciate your help...