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dCS 974 User Manual Manual for Software Version 1.0x
dCS Ltd May 2001
Manual part no: DOC1241121A1
Page 83
Document No: OS-MA-A0124-112.1A1
Contact
dCS
on + 44 1799 531 999 email to: more@dcsltd.co.uk
(inside the UK replace + 44 with 0) web site: www.dcsltd.co.uk
Figure 30 – 44.1 kS/s to DSD, showing DSD bit alignment
Multiple Channel Multiple Sample Rate Synchronising
DVDs can make use of mixed sample rates in their multi-channel mode – for
example, 96 kS/s in the front channels and 48 kS/s in the rear channels.
As well as the problems mentioned above in the section Multiple Channel
Sync’ing, use of multiple channels brings an additional problem in that the
group delay in the sample rate conversion process varies with the sample rate.
It generally gets longer as the sample rate gets lower, making the rear channels
seem further away than you might want.
Figure 16 shows how a master clock may be used with several dCS 974‘s in
parallel to get simultaneous synchronised sample rates out at the same time.
Please contact dCS if you need support for this process.