while i cling on to my audio jack personally, the article use cases would be trivially replaced by dongles and adapters there is the lightning dac for apple an

while i cling on to my audio jack personally, the article use cases would be trivially replaced by dongles and adapters there is the lightning dac for apple and equivalent for other brands there are oodles of audio <-> bluetooth adapters then i am sure there will be a raspberry pi / beaglebone / arduino with open source oscilloscope clients available.