 
 <prompt> ```Which one happen first, Sony AES technical paper publish or the 62nd AES Convention happen? Based on the last question, write a context wey contain the answer. E fit be 1 - 20 sentences. Context:``` <response>: Heitaro Nakajima, wey develop one early digital audio recorder inside Japan national public broadcasting organization NHK for 1970, come be general manager of Sony audio department for 1971. Him team develop one digital PCM adaptor audio tape recorder wey dem use Betamax video recorder for 1973. After dis one, for 1974 e easy for dem to store digital audio for one optical disc. Sony first show one optical digital audio disc for public for September 1976. One year later, for September 1977, Sony show press one 30 cm disc wey fit play 60 minutes of digital audio (44,100 Hz sampling rate and 16-bit resolution) using MFM modulation. For September 1978, the company show one optical digital audio disc wey fit play for 150 minutes, 44,056 Hz sampling rate, 16-bit linear resolution, and cross-interleaved error correction code—specifications wey similar to the one wey dem later agree on for the standard Compact Disc format for 1980. Technical details of Sony digital audio disc dey for the 62nd AES Convention, wey dem hold for 13–16 March 1979, for Brussels. Sony AES technical paper publish for 1 March 1979. One week later, for 8 March, Philips show prototype of one optical digital audio disc for press conference wey dem call "Philips Introduce Compact Disc" for Eindhoven, Netherlands. 