If you are thinking of a hardware solution like building a board for
your project, i am pretty sure there are codecs (alternatively ADC and
DAC chips) that support sample rate conversion. Check out codecs from
cirrus logic. You do not need a DSP in this case because,
simplistically speaking, you are not doing any kind of processing on
the data coming from the ADC or codec.

I am new to this list and this is infact my first attempt at answering
queries. So please cross check with somebody more knowledgeable.

Thanks.

-vj



"AL" <[email protected]> wrote in message news:<FtW3d.45331$[email protected] uk>...
> Hi,
>
> I'm a university student studying Electronics Engineering and Bournemouth
> University in England.
>
> For my final year project I need to understand how CD mixers work. I know
> they alter the sample rate to change the speed (pitch) of the track being
> output thus allowing the DJ to mix the tracks (getting the tempo's to
> match).
>
> How is this done? Are there specific DSP processors to alter the sample
> rate? Or can any standard audio DSP processor be programmed to perform this
> task?
>
> Any help/advice/website links greatly appreciated!