One of the main parts of our Rosh Hashana service is the blowing of the shofar. I had always been taught in school that we are really only halachically required to blow a set of tekia-teruah-tekia blasts. However, in our times since we do not know the true sound of the tekia, we cover our bases and blow it in several possibilities. therefore, we have sets of tekiah-teruah-tekia, tekiah-shvarim-tekia, and tekiah-teruah + shevarim -tekia (for those not familiar with these terms, i have defined them below). After these, we blow additional ones just to round out the service.
This doesn't really jive with the concept of an unbroken chain from the time God gave the torah at Har Sinai to the Jews until our present day, which is something that is en essential belief in Orthodox Judaism. For if the chain was trully unbroken, we wouldn't have an issue of forgetting the right sound. This of course leads me to wonder what other things may have been forgotten and we are doing completely wrong.
Shofar sound primer:
teruah - one long shofar blast of approximately 5-6 seconds
shevarim - 3 medium blasts
teruah - 10+ very short blasts
shevarim-teruah - 3 medium blasts folowed by 10+ very short ones.