<human>: Q: Who created the CD-4 format?
 A: A different format, CD-4 (not to be confused with compact disc), by RCA, encoded the front-rear difference information on an ultrasonic carrier, which required a special wideband cartridge to capture it on carefully calibrated pickup arm/turntable combinations.
 Does the answer correctly answer the question

OPTIONS:
- yes
- no
<bot>: yes