Hi,
You can find the test code for C6747 and OMAPL137 from the below link,
http://support.spectrumdigital.com/boards/evmomapl137/revg/
This package have the sample application for audio.
evmc6747_v1\dsp\tests\aic3106
evmomapl137_v1\dsp\tests\aic3106
In addition, kindly have a look at the below wiki page,
http://processors.wiki.ti.com/index.php/Getting_Started_Guide_for_C6747
http://processors.wiki.ti.com/index.php/OMAP-L137_Hardware_Design_Guide