Hi Jeff,
         Thanks for ur reply. The code snippet that u have mentioned (i.e. loopback) is already
working and i hav already tried it out. But I just want to store the audio input in some buffer
array or any thing else. And then I want to loop it back after sometime (in seconds just like
after introducing some delay). Please look in to my code to understand wht i am trying to do.
This is my first assignment to configure DSK and a preliminary demo (abt which my question is).
After that i will start learning DSP concepts and tutorials and manuals of CCS. So kindly help
me to get this first step.

Regards,

Umer

Umer-
>
>>          So did u find answer to your query? I am really a new comer in
>>  DSP domain and unknown to working C5510 in detail. I want to read
>>  audio input from mic and store it.Then i want to play it back to
>>  headphone.
>> 
>>  This is my main():
>
>First I would try something very simple to verify your DSK board, tool
>set-up, build options, memory map, and other basic factors are Ok:
>
>void main() {
>
>DSK5510_AIC23_CodecHandle hCodec;
>Int16 left,right;
>
>    /* Initialize the board support library, must be called first */
>    DSK5510_init();
>
>    /* Start the codec */
>    hCodec = DSK5510_AIC23_openCodec(0, &config);
>
>    /* Audio loopback */
>    while (TRUE) {
>
>      while (!DSK5510_AIC23_read16(hCodec, &left));
>      while (!DSK5510_AIC23_read16(hCodec, &right));
>
>      while(!DSK5510_AIC23_write16(hCodec, left));
>      while(!DSK5510_AIC23_write16(hCodec, right));
>    }
>
>    DSK5510_AIC23_closeCodec(hCodec);
>}
>
>This should enable audio loopback -- you should hear whatever is on the
>inputs.  Does that much work?  If so, then you can go step-by-step to add
>the functionality you need, testing each step carefully.
>
>Also, here is a nice page for generating a sine wave with DSK 5510:
>
>  http://www.tkt.cs.tut.fi/kurssit/3516/exercises/fall05/test_audioIO.c
>
>-Jeff
>>  void main()
>>  {
>> 
>>      DSK5510_AIC23_CodecHandle hCodec;
>>      Int16 i,j,k,left,right;
>>      Int16 input1[8000];
>>   	Int16 input2[8000];
>>      /* Initialize the board support library, must be called first */
>>      DSK5510_init();
>> 
>>      /* Start the codec */
>>      hCodec = DSK5510_AIC23_openCodec(0, &config);
>> 
>>      /* Generate a 1KHz sine wave for 5 seconds */
>>      for (i = 0; i  < 10; i++)
>>      {
>>          for (j = 0; j  < 8000; j++)
>>          {
>>              /* Read a sample from left channel */
>>              while (!DSK5510_AIC23_read16(hCodec, &left));
>>              input1[j]=left;
>> 
>>              /* Read a sample from right channel */
>>              while (!DSK5510_AIC23_read16(hCodec, &right));
>>              input2[j]= right;
>>  	    }
>> 
>>       }
>>      for (i = 0; i  < 10; i++)
>>      {
>>  	  for(k=0; k   	  {
>>          while(!DSK5510_AIC23_write16(hCodec, input1[k]));
>>          /* Send a sample to the right channel */
>>          while(!DSK5510_AIC23_write16(hCodec, input2[k]));
>>  	  }
>>      }
>>      /* Close the codec */
>>      DSK5510_AIC23_closeCodec(hCodec);
>>  }
>> 
>>  But it is not giving any output. What to do?
>>  kindly help me where i am going wrong. I will be waiting for ur reply
>> 
>>  regards,
>>  Umer
>> > 
>> >   hello everybody
>> > i m an student doing project "Real time
>> > implementation of G.723.1 on TMS320VC5510"
>> > right now i am ready with optimised code which is
>> > running in CCS simulator by taking i/p from file and
>> > putting o/p in2 file
>> > but now my next step is to run it in to DSK board for
>> > that i have to take i/p from mike and taken o/p from
>> > headphone
>> > and for that i have to interface adc/dac of that
>> > particular board which uses AIC23 as a codec.
>> > i tried 2 get some idea from audio project available
>> > in TI but not getting the flow as i don't aquant with
>> > DSP-BIOS also
>> > please any1 sugest me how to proceed or else can
>> > anybody send me programme to interface codec withought
>> > using DSP-BIOS
>> > 
>> > sorry for long mail
>> > waiting for early reply as i have to submit my project
>> > bbye
>> > Alpana
>> > M.E.(GCOEP)
>> > Pune
>> > 
>>