The Piano Guys celebrate 10 years of merging pop and classical music, by releasing a new album.

If you know The Piano Guys — the instrumental pop-classical group that got its start in St. George, Utah — it’s probably from one of the group’s viral videos. They usually show pianist Jon Schmidt and cellist Stephen Sharp Nelson in some gorgeous location, performing their signature mix of pop and classical melodies.

Or maybe you saw them on “The Tonight Show” in 2012, performing their cover of One Direction’s “What Makes You Beautiful,” where they used every part of the piano — not just the keys, but the strings and the soundboard.

The Piano Guys are turning 10 this year, and are marking the occasion with a new album, called “10.” Here’s an interview with Schmidt, Nelson, producer/videographer Paul Anderson and music producer/songwriter Al van der Beek, conducted via email, that I wrote up for sltrib.com.