Podium currently does not support sample rate conversion, you have to set your arrangement’s sample rate to match your audio files’ sample rate (most often 44.1 or 48 KHz).
You can set this in the “Arrangement Properties” dialog, accessible either from the arrangement context menu on the project page (right-click it in the middle column, select “Properties”), or from the menu bar on the arrangement page (“File -> Arrangement Properties”). Whenever you create a new arrangement, you are also asked to set the sample rate for it in the “New Arrangement Properties” dialog.
Hope this helps.
.
