For Good Friday, here is the famous aria Erbarme dich from Johann Sebastian Bach’s St. Matthew Passion, with mezzosoprano Marianna Pizzolato.
If you have three spare hours, I would listen to the whole thing. You should do this at least once in your life.
Scientific Clearing House 
what instrument do you play?
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@Tom Right now I just watch my daughter play violin.
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i’ll probably listen to that when i’m ‘multitasking’—bach is ok. i would also reccomend listening to ‘holiday in cambodia’ by the DK’s (dead kennedy’s punk band, on youtube—saw em a few times and there were many conflicts) its all of less than 5 minutes. someone i know worked in cambodia with doctors without borders—last time i saw him was kayaking—i had never kayaked before so i was in the passenger seat (see ‘the passenger’ by iggy pop, also on youtube—american classical music), and he topsized his kayak so i had to get out , drag him and his kayak to shore, and i learned to kayak—he was the passenger. (he’s from louvain la neuve belgium —famous for von Parijis—guaranteed income . some of that is also related to the ‘brussels school’–prigogine, and ronald graham , h haken (synergetics) , hio, etc. also dealt with path integrals and quasipotentials.
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