Invention idea: Mini-Tivo for talk radio

An invention I’d like: 1) Turn on a radio talk show, find it’s at commercials. 2) Let me rewind up to 15 minutes to hear the actual talk. Either an iPad app or physical device (like a traditional radio) would work for me.

By my count, it seems like 75% of the time I turn on the radio it’s either at a commercial break, or goes to break within 1-2 minutes. I like to turn on my radio in the kitchen while washing dishes or cooking meals, but the commercials are overwhelming.