Cracks 'n pops

Dekkie · Post by **Dekkie** » Mon Apr 30, 2007 12:43 pm

Hi all!

I have 2 PC's, connected via SP-DIF (both ways).
In one PC I have an Audigy card, running on KX, in the other a Creamware Scope Home.
I play music on the Audigy PC, record (Cubase SX) on the other one.

Since a couple of months, on the Audigy PC, every few minutes, the SP-DIF icon pops up and audio playback is muted, causing the other PC to stop recording. I found out this stops when I switch the Scope to Master, but then........ I get cracks and pops in my audio.

Any thoughts?

Thanks,
Hans

Post by **hubird** » Mon Apr 30, 2007 2:49 pm

You use the right '75 Ohm cable' for the SP/DIF connection?

skwawks · Post by **skwawks** » Mon Apr 30, 2007 3:10 pm

Can you set the audigy to slave?

Dekkie · Post by **Dekkie** » Mon Apr 30, 2007 3:49 pm

Yes, I'm using the right cable, and no opportunity to set Audigy to 'slave'.
No luck there...

valis · Post by **valis** » Tue May 01, 2007 5:01 am

Because it's a consumer SPDif implementation (which can only be master). Using Scope slaved to a card with a vastly inferior samplerate clock isn't a great idea. ALSO, most Audigy & Creative Labs cards only support 48khz.

Why sync the two at all? Use a small inexpensive external mixer/monitor controller and hook your monitors to that.

Dekkie · Post by **Dekkie** » Tue May 01, 2007 5:39 am

I have no need to sync them. I just want one of them to record the output of the other. And since the scope hast to be set to either slave or master, I fiddled around with that. So: when set to 'slave' it records fine, for a few secs and then mutes for a few sec, and when set to 'master' it records continuously, but with cracks and pops.

valis · Post by **valis** » Tue May 01, 2007 9:30 am

Why do you want one to record the output of the other? Looking here we might find ways to achieve similar results just within a single domain.

Also, have you used a simple phono/rca cord to connect the Spdif i/o? Because if the signal is muting for a period of time then it isn't recieving a consistant clock. The reason it works when not slaved to the sblive 'with clicks' is because the sample frames are not lining up properly, but the Scope card could care less (since it is set to sync to itself).

Terrac · Post by **Terrac** » Tue May 01, 2007 10:00 am

Set your sampling rate to 48Khz

Dekkie · Post by **Dekkie** » Tue May 01, 2007 11:06 am

48 KHz seems to do the trick, thanks!

Terrac · Post by **Terrac** » Tue May 01, 2007 11:58 am

sound blasters and most other consumer level audio cards with digital capabilities in the form of toslink or spdif are locked to 48khz

Dekkie · Post by **Dekkie** » Tue May 01, 2007 1:33 pm

I was just confused, because untill I installed everything fresh, it worked @ 44.100...