公开(公告)号：EP0621976B1

公开(公告)日：1999-06-16

申请号：EP93903568.9

申请日：1993-01-15

Applicant: ALESIS

Inventor： BARR, Keith c/o ALESIS ,  ZAK, Alan ,  RYLE, Marcus ,  BROWN, David

IPC: G11B5/86 ,  G11B27/032 ,  G11B27/10 ,  G11B27/30 ,  G11B15/00

CPC classification number: G11B27/10 ,  G11B27/002 ,  G11B27/032 ,  G11B27/3036 ,  G11B2220/90 ,  G11B2220/913

Abstract: A method for synchronously operating two or more rotary head digital audio tape recorders without having to dedicate a separate timing track. The present invention synchronizes the machines in three steps. First, the slave unit reads the time code (111) value from the data stream and compares this time code (111) to the master's time code (111) examining the difference in time code (111) values and adjusting the transport speed so that the values are approximately equal. Next, the slave's capstan motors are slowed down (or sped up) so that the slave and master units are within one drum revolution of each other. Finally, the slave's microprocessor adjusts the speed of the entire system to skip individual samples until the master and slave units are synchronized.