Topic: Digiface hdsp + various i/o converters problems
Ii’m using an older digiface hdsp with a pci- expess card and an external power supply 12v, 1A.
I’m using all 3 groups of adat i/o ports. And I’ve connected 1 Behringer ada 8000, 1 presonus digimax fs , 2 motu 2408 mk2 standalone, 1 for in and 1 for out. All pretty cgeap devices.
Syncing all 3 tigether is a big headache.
Behringer syncs flawlesslyon its own as slaves with rme acting as master in adat syncin.
Presonus recently shows problems both as a master and as a slave on its own.
I have to add that i was using the prosonus flawlessly as an adat slave for a long time with my other interface - rme babyface.
Maybe the extreme heat - even if there is proper space on the rack between the 2 devices…about 5 cm gap.
Motus work just as masters in adat mode, but they can be slaved to rme with “unterminated” wordclock bnc syncing. The wordclocks of these 2 devices are connected in parallel, from in to in of each device.
Presonus is full of slight problems (small pops and jittering) when in bnc slave mode - it has a termination switch but it doesn’t really change a thing=, and it doesn’t work well at all as a master in bnc mode ( it’s not a good master even in adat mode).
Behringer is very good on slaving with bnc wordclock from rme - apparently it also prefers “unterminated” bnc syncing. But it can’t be a master at all without adat.
Motus are not good on mastering the other devices, even if they are second best to RME.
So it’s only internal wordclock for RME and this coming out from wordclock out.
I’ve used a cheap wordclock distributor by la audio (clk c4), without good results. It has an input termination switch ehich can cause trouble with undertermination etc.
I’m using average 75 ohm bnc cables. I ‘ve made more expensive diy ones (somer - neutrik), with similar results, but i can’t use them as a reference since they are diy.
The distances are normal. 2 meters from rme for the presonus and the behringer. 1 meter for the motus.
I’ve tried correct daisy chaining. All connected only from the world clock ins with t connectors and only terminating the last unit with 75ohm terminator. No good results.
Any advice or idea, other than throwing most or all of that stuff away :-) ?
Would an external clock help? Is it worth it with such cheap equipment and would a cheap clock like art sync gen or something make a difference?
Can i mix and match modes (presonus adat slave to rme, motus and behringer bnc slaves to rme)?
I’ve reached a dead end so i’m pretty desperate.
Thanks in advance