CCS / TMS320C5545：C5545 BoosterPack Software document

Part Number: TMS320C5545

Tool/software: Code Composer Studio

I am doing the C5545 BoosterPack out of Box Demo. I see the audio source can be read from the SD card and the LINE IN.

Now, I am successful hear the sound from the SD card, but I do not know how to Use the LINE IN way to do the out of Box Demo.

I see in the document, it seems that the out of Box Demo can first record a sound and then play it? (using the on-board mic？or the mic on the headphone?)