Following several reports from earlier this week claiming Apple’s much rumored free, ad-supported radio service would be tightly integrated with its iAd business, AdAge claims to have more details on how ads will work in the service.

In case you were wondering whether or not the ads would be audio ads or traditional app-like iAds, AdAge says both:

The aim of the ad-supported service, which according to the report’s sources will not include the ability to search or play specific songs on-demand, is to drive song downloads to iTunes.

The report adds that a spokesperson for Sony/ATV Music Publishing, the one major publisher that reportedly hasn’t made deal with Apple yet, said the company “is optimistic it will sign a deal with Apple soon.” 

Apple is largely expected to introduce its iRadio service at next week’s WWDC developer conference.