Markus wrote:
> Hi,
> 
> I work with a TI DSP (C6713). I read and write data with MCBSP and EDMA
> (Ping Pong buffering). Now my question is how long will it take to send
> one Sample from the Input to the Output. The Samplefreq is 48KHz and
> the Buffersize 128Samples.


to accquire 128 samples to your input buffer it takes you
128/48000=2.66 ms (this is the t here) ... then you switch
the buffer and immediately start playing the buffer?


let's draw a picture

---------------> time

      tttttttt
rec  01234567
play         01234567


and you want to know the time from sample 3 beeing recorded to beeing 
played back? that should be 2.66 ms as well
I would call that latency from input to output


In case you want to do any processing in between you would need 3 
buffers and get more latency ...


I got a pile of white paper and a pen at my desk - in any case I'm not 
sure I start drawing. I take white paper because some of them could end 
up in a folder for documentation ...


bye,
Michael

Hi,

I work with a TI DSP (C6713). I read and write data with MCBSP and EDMA
(Ping Pong buffering). Now my question is how long will it take to send
one Sample from the Input to the Output. The Samplefreq is 48KHz and
the Buffersize 128Samples.
I am not sure if the right answer is 128/48000=2.66ms or
2*128/48000=5.33ms.

Thanks