MPC5000 ADAT errors with Profire 2626

Hi all,

As the heading suggests, I'm trying to get my MPC5000 to send audio via ADAT to my Profire 2626. I'm no stranger to ADAT, I used to work for Avid Audio but this has me stumped. I link the two via ADAT, set up everything on the Profires end as it should be and all I get is glitchy distorted sound out of the MPC. Everything is crunchy and to my ears it sounds like a sample rate error. The profire is set to 44.1khz (which afaik is the standard for the 5000), press play and grunge, I can send the programs out from channel 1 -8, but it's still grunge. The weird thing is, if I set my sync source to Optical rather than internal, the MPC plays fine but I only get 1 channel?!

Has anybody had any luck running the MPC5000 via ADAT to a ProFire? Because I really don't get the error. And if I recall, I had a similar issue when I tried connecting the MPC to my Avid Omni. So I don't think this is an error on the ProFires side.

Not sure about the MPC5000 specifically, but...

When connecting two devices digitally, you have to sync the wordclock of the two devices.

So the ProFire has to be set to sync it's wordclock to a MPC5000 digital output, or the MPC5000 has to be set to sync it's wordclock to the ProFire digital output.

You can't have them both running on their own internal wordlock, one has to be wordclock master, and the other has to be wordclock slave.

The MPC5000 has no way of setting the slave or master, it does but only for MMC or midi time code which I've tried and hasn't
changed the situation. I've also tried setting the ProFire as the master but without the MPC knowing it should be the slave, I'm just getting a mismatch. There's no way of even clocking the MPC5000 it seems :/

The 1 and only option you have with regards to ADAT on the MPC is send out master via L+R or 1+2, that's it?! Lol.

I'm trying to delve deeper but there doesn't seem to be much in the topic, I see another member on the board had the exact same problem in 2011 with no luck. He thought the profire was faulty. And another guy on Gearsluts is having the same issue :/

Has anybody ever used the ADAT out on this unit?

The ADAT on the 5k is 44.1k at 16 bits and can't be changed, is that what you have the Profire set for?

Also the Profire needs to be slaved to the 5k audio.

https://www.gearslutz.com/board/electro ... t-mpc.html

I found this, the MPC needs to be the master. Yup, the sample rate is set to 44.1 on the ProFire, I haven't seen any options to change the bit depth. But here's the weird thing, I'll set the ProFire to slave and 2 things will happen, the clock greys out but not before jumping to 172khz and the audio will be perfect for a split second and then I'll only get 1 channel out of my left channel. Also the ADAT channels will drop from 8 to 2 (even though I've routed the program channel outs to all 8 channels) and I'll only receive audio through ADAT A 1

So what it looks like, is the Profire is getting confused with the signal, SMUX on the Profire is kicking in and only allowing 1 channel through because it needs the other part of the stereo channel to come through on ADAT B. It's seeing the MPC as pushing out 172khz rather than 44.1?!

Now that I know the MPC has to be the master at least it makes it a little easier. I think I'm going to have to mess around a bit more. Thanks guys, I'm getting closer

Ok well the problem exists with the ProFire. Tested it out on my Avid Omni and it works as it should, no issues at all.

S/PDIF on the MPC5000 has in/out so i'm going to see if I can send a signal to the S/PDIF input on the Profire, maybe it'll pick up the clock correctly.

And success! The problem was with the fact that the ProFire wasnt receiving an input wordclock from the MPC. I had a feeling you could send that sync over S/PDIF, so I made a cable (I tried std RCA and they didnt work, it needs to be COAX), connected it up and bam it works, all eight channels streaming out the MPC

For those that are trying this or haven't got it to work, in the setting tab of the ProFire Settings, set the Sync Source in Hosted Mode to S/PDIF Coax not Optical Port A