Want to attract birds? Specifically, Purple Martins or Eastern Bluebirds, Baltimore Orioles, House Wrens, House Finches, American Goldfinches, & Indigo Buntings etc etc. Then you could try the Bird-X Songbird Magnet.
“As bird lovers, it only makes sense with the science & resources we have available, to offer an electronic songbird attractant.”
– say the manufacturers. As a further refinement, if you’re keen on all the birds listed above, but just can’t abide woodpeckers, you could also invest in the Bird-X Woodpecker PRO
“Naturally recorded woodpecker distress calls & predator cries confuse, frighten, & disorient woodpeckers, forcing them to seek calmer space. “
BONUS: A streaming radio service of birdsong (Note: may include woodpeckers)