The BDN is making the most crucial coverage of the coronavirus pandemic and its economic impact in Maine free for all readers. Click here for all coronavirus stories. You can join others committed to safeguarding this vital public service by purchasing a subscription or donating directly to the newsroom.BELFAST, Maine — For a quarter century, musician Ando Anderson has filled downtown with the sounds of bluegrass, rock-and-roll, folk, jazz and more during Belfast Summer Nights, the weekly outdoor summer music series he founded.