re atc tape. the time interval between 370 first on radio and signing off is 53 minutes. in the report the tape covering that time period only lasts 7 minutes so there must be plenty of splices perhaps explaining the noises-off. there were 7 minutes of real time between the repeats of level at 350. I am curious about another tape I have heard which had lumpur radar tell 370 to contact HCM three times. the aircraft did not respond until the third. will try to find tape again.
The recording corresponds with the transcript that was published earlier