I’m a big fan of Apple’s AirPlay technology, which lets you stream audio (and video) from iTunes on your Mac, or from supported apps on your iPhone, iPad, or iPod touch, to AirPlay-enabled devices ...
[Avian]’s dad got a new ham radio transceiver with a 3.5 mm jack, and his pile-of-cables got him a headphone cable from Bose headphones. He built a DB9 to 3.5 mm adapter with that one – and it failed ...