Context: The popularization of the Jewish chant may be found in the writings of the Jewish philosopher Philo, born 20 BCE. Weaving together Jewish and Greek thought, Philo promoted praise without instruments, and taught that "silent singing" (without even vocal chords) was better still. This view parted with the Jewish scriptures, where Israel offered praise with instruments by God's own command (2 Chronicles 29:25). The shofar is the only temple instrument still being used today in the synagogue, and it is only used from Rosh Chodesh Elul through the end of Yom Kippur. The shofar is used by itself, without any vocal accompaniment, and is limited to a very strictly defined set of sounds and specific places in the synagogue service.

Question: What is the name of the philosopher who praised music without instruments?
Answer: Philo

Question: What did Philo's views on the absence of instruments clash with?
Answer: Jewish scriptures

Question: What is the one instrument still in use today by the synagogue?
Answer: shofar

Question: The shofar stops being used at the end of what Jewish event?
Answer: Yom Kippur

Question: How is the shofar used?
Answer: by itself, without any vocal accompaniment

Question: Who popularized Greek chant?
Answer: Unanswerable

Question: What did Philo promote in 20 BCE?
Answer: Unanswerable

Question: Who taught that a capella was the best form of whorship?
Answer: Unanswerable

Question: Who commanded Christians to offer praise with instruments?
Answer: Unanswerable

Question: What kind of accompaniment is used with the shofar?
Answer: Unanswerable

Question: When was the Greek philosopher Philo born?
Answer: Unanswerable

Question: What Jewish chant is still being used today in the synagogue?
Answer: Unanswerable

Question: During what periods of time is silent singing used in the synagogue?
Answer: Unanswerable

Question: How is silent singing used when practiced in a synagogue service?
Answer: Unanswerable

Question: What did Rosh Chodesh Elul write about that became popular?
Answer: Unanswerable