[sdiy] DIN SYNC output stage

Florian Anwander fanwander at mnet-online.de
Mon May 9 13:02:55 CEST 2011


Hi

Dave Kendall schrieb:
> Can anyone steer me towards a schematic and info on a typical DIN SYNC 
> output stage?
http://fa.utfs.org/diy/rolandtr808/roland_TR-808_service-manual.pdf
Page 5 or 8 respectively

Please obey the description for "START/STOP & Tempo Clock" at page 6, 
which describes a delay of 9ms of the first clock edge after the 
positive edge of the start signal.

Unfortunately Roland missed to make clear that this delay is a 
requirement for a reliably working synchronisation. Most MIDI-Clock to 
DIN-Sync converters I know miss this delay, which in consequence can 
cause ugly "late clocking".

Florian



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