Using just a pitch pipe and their voices, Ken Paulhamus and his three sons formed the barbershop quartet Achording to Dad more than 20 years ago.

The group has changed a little since then ­— one of the brothers has been replaced with a cousin — but the traditional barbershop quartet sound remains the same.

Check out our interview with Paulhamus and his family — along with some of their music — in this week’s Keeping the Beat podcast at dailyitem.com.