Motu 828 + Octopre + DP7.23 = newbie config failure

[Reapingcrone]

Colleagues,

Please don't laugh (too much). After a fairly long hiatus I've recently upgraded to DP7 and began recording again. Fairly good results with my Motu 828 going straight into my iMac (no preamp).

I pulled out my (little-used) Octopre which I've had for about 6 years -- I connected it to my 828, although I must confess that I really don't know what I'm doing. Right now I have an optical light pipe connected to the *IN* slot in the back of the 828 ("ADAT or SPDIF") slot. Do I need *2* optical light pipes (in and out)?

In DP7 Setup > Configure Audio System > Configure Hardware I have:

Master Device Motu 828 (no other selections available)
Clock Mode = Motu 828 (ditto) --> INTERNAL (ADAT or SPDIF is possible).

I apologize for being such a newbie. In advance I really appreciate all your kind assistance!

[PhireAlly]

Hi,

It sound like you have your Octopre and 828 connected correctly.

Couple of things to note ..... If you are sending signals from the Octopre to the 828, it's best to have the Octopre be the Master device and the 828 be the Slave.

If you do it this way, the 828 and DP must be set to ADAT for proper synchronization.
Remember to make sure that the sample rate of the 828 and DP are the same as the Octopre.
(e.g): 44.1 / 48 / 88.2 / 96 /

One more thing ..... The two ADAT connections on the Octopre are for output only. They allow you to send signals at 88.2 & 96K by using the SMUX (Sample Multiplexing) protocol.

Hope this helps,

Blessings,
PhireAlly

[HCMarkus]

PhireAlley has it right: with a single lightpipe you MUST make the Octopre the clock master, or you will have clicks and pops galore. I prefer using a wordclock BNC connection (if available - can't remember if the original 828 offered it) for the cleanest clock possible.

As Frodo would tell you, One Clock to Rule Them All is a GOOD thing when it comes to digital audio.