If you need any other reason today to marvel at the universe we all inhabit, witness someone actually etching a round tortilla with a laser cutter and playing (extremely noise-buried) music. This most certainly expands the horizons of Record Store Day to include your taquerias and Mexican grocery stores, but you have to be somewhat of an artisan to pull it off. The Instructables site recommends uncooked flour shells over corn, less lumpy in texture than cooked flour and uncooked/cooked corn. Canasta brand is one of the more findable makes, and the 9” diameter allows for a lengthier tune (I supposed a smaller tortilla can be used for a Minor Threat or Minutemen song).

One big difference though is the playback between 45 RPM and 78 RPM; as you can tell by this etching of “Macarena,” the melody is barely audible through the gunk, though one can definitely make out the chorus when played at 45 RPM.
 

 
Doing an A/B test with another tortilla with 45/78 you can definitely hear the melody better through the noise:
 

 
This clip below shows the tortilla actually being etched. This opens up all kinds of new analog dimensions and possibilities. Hate a certain intro of a song? Take a bite around the edges to get rid of it (they say the uncooked shells are edible, though taste somewhat burnt). More clips via the Rapture Records You Tube page.
 

 
 
Thanks Mike Lupica/Zena Kesselman!