For nine years, Chicagoan Michael Teach has put together a podcast called Chicago Acoustic Underground. It features music acts from Chicago and other parts of the world. And not too long ago Teach started CAU Dog Records. His latest endeavor is the Chicago Acoustic Underground World Music Showcase this Friday at Mayne Stage. For this week’s Global Notes with Morning Shift and Radio M host Tony Sarabia, Teach stops by to talk about CAU and his upcoming showcase. PHOTO: Michael Teach (Courtesy of Chicago Acoustic Underground)