Modern TIG welders use a high frequency switching power supply to generate high currents needed in welding. With a very simple hardware modification, the welder can modulate an audio input signal, creating a plasma tweeter whenever the user strikes an arc.
The playback system can either take input from a live audio source, or start and stop a recording to ensure nothing is missed. It could even be used for the welder to audibly communicate system status to the user.-- Aq_Bi, Apr 27 2015 I can see this being used at heavy metal concerts-- hippo, Apr 27 2015 Anything that makes a more sound weld has to be uplifting.-- wjt, Apr 27 2015 Mmmyes. Mmyes! All of a sudden the drone of conventional tig seems mighty dull. You would most definitely want to link play/pause to the foot pedal.
I imagine Beethoven's fifth would leave a somewhat inconsistent weld. Perhaps the study of ancient welds can reveal what the welders were listening to at the time?-- mitxela, Apr 27 2015 You could make music by having several welders join together.-- 8th of 7, Apr 27 2015 One in each hand! By welding on big resonant tanks, you should be able to get lower frequencies too?-- pocmloc, Apr 27 2015 Definitely the spark of an idea here ....-- 8th of 7, Apr 28 2015 Fire, steel, and music [+]-- Voice, Apr 28 2015 random, halfbakery