problems in syncing a vamp with wordclock

[bosone]

i have a very strange and weird problem.
i have just installed a syncplate and i'm trying to sync my behringer v-amp without success. has anyone some experience with the vamp??

i have this setup:
scope pro with syncplate
pulsar 1
1) pod pro
2) v-amp

the syncplate is connected to 1), then there is a T connector and a shorter cable goes to 2)

1) and 2) are both connected with Spdif to scope and pulsar.

when i set the pod pro sync to external it is correctly synced to scope and i can use it without problem. so the wordclock is working.

but if i try to sync the vamp to external it does not work, it does not even emit any sound! the problem disappears if i use v-amp as clock master: the signal arrives via sp-dif to the system and everything is OK. so the spdif cable is not the problem.
in both cases i did the appropriate configuration (master or ext sync) of the vamp.

i even tried to disconnect the wordclock cable from POD and connect the same cable to vamp: nothing happens, the problem is not solved! so it is not the wordclock cable, because it works with the POD.

maybe i'm missing something?

is anyone able to sync the vamp as slave with wordclock??

thanks!!

[Mr Arkadin]

Well I always had this problem with PodXT Pro - had to use it as master with Scope as slave, could never get it to work any other way. Seems Behringer may have copied all the code including this bug!

[bosone]

it's strange since the pod pro (the first version) is working seamlessy!

So the pod XT is different from the pod pro?? i was just thinking to sell the vamp and buy the pod xt! :D

[Mr Arkadin]

Even the new Pod HD doesn't work as slave as far as I'm aware. Not sure why the later models are less tolerant.

[garyb]

t- connectors SHOULD NOT work properly with word clock.

for multiple devices you need a clock distributor.
i doubt this has anything to do with the problem you mention, however. it seems like vamp just doesn't work...

[bosone]

actually, if i connect first the vamp, put a T on it and then the POD, the POD seems to work OK even if it is after the T connector.

i didnt made in-depth tests, perhaps when i have time i will..

[garyb]

t- connectors and word clock= trouble.

ART makes a clock gen/distributor that's about $100. that would always be a better choice(slaving everything to the ART's word clock) that a t- connnector....

[bosone]

ok, thanks for the suggestion!
actually now i do not even need a T connector or clock gen since i cannot slave the v-amp... only the pod!

But the sync plate is still a nice addition because now, if needed, i can make the vamp as master, sync with SPDIF and slave the POD with wordclock, so i can use both vamp and pod in digital at the same time... not possible without the sync plate

and i can use the pod as slave anytime without bother to change between master and slave in scope.

[bosone]

it's even more strange than this!
i have discovered that the problem is not the vamp but the pulsar1!

my system is scope (with sync plate attached) and pulsar 1.
if i sync the vamp or the POD with the syncplate and connect them to scope via spdif everything is OK
but if i connect one of them to the pulsar, then they do not sync!
so, i was thinking that both scope and pulsar would perform in the same way but it seems that the pulsar is working as the sync plate is not connected at all!

the only way to sync something with pulsar is to set SFP as slave!

any more suggestion?

[jksuperstar]

Try connecting 1 audio cable between the two and see what happens.

I had a problem long ago with an Emu Command Station sending SPDIF, but my Emu 1616m sound card wouldn't lock. But if I added an audio cable, but still used SPDIF, it worked fine. My theory is there may have been bad grounding (ground loops, lack of ground on SPDIF, whatever), and the audio cable provided the needed ground connection. Maybe just check your grounding situation for loops.

This was true SPDIF, with RCA jacks, not ADAT optical or AES/EBU XLR.

[bosone]

thanks for the suggestion, i tried but it do not work!
beside spdif, i have also midi and audio out connected, so the grounds are OK.

[bosone]

any more ideas on this?

[astroman]

S/PDIF on Pulsar One is different from the later generation 2 boards.
it can't do round trips, eg transmit and record s/pdif at the same time - it's either send or receive

cheers, Tom

[bosone]

ok! that solves the problem!
so with a pulsar 2 in principle it should work, right?
what about a luna? can i sync the scope with wordclock and receive the spdif from luna?