In this shiur we analyzed the nature of the prohibition of playing musical instruments on shabbat (here is a link to those mekorot) in order to better understand a surprising leniency of the Raavya (quoted in the Tur) permitting people to arrange for non-Jew to play music at a seudat nissuin on Friday night. This opened up an important discussion on the nature of the heter of b’makm mitzvah. (here is a link to those mekorot)
We then addressed the issue of having a non-Jew fix an eruv on shabbat. This introduced the category of mitzvah-d’rabim which becomes a way in which we revive the position of the ittur. (here is a link to the eruv mekorot)
There were some internet problems, so the shiur was divided on the audio into three parts:
Amira – Musical Instruments – Fixing the Eruv 1
Amira – Musical Instruments – Fixing the Eruv 2
Amira – Musical Instruments – Fixing the Eruv 3