Possible issue dm3200/if-fwdmmkii and lpx 10.2.1

fclum

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Oct 12, 2012
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From
Bronxville, NY
Gear owned
DM-3200, IF-FWDM MKII
I hope I'm posting this correctly. If not I apologize. Here goes:

Interesting phenomenon that I believe may be related to the new Logic Pro X version 10.2.1 update and the IF-FW/dm mkII.

I’ve got 4 discs connected to my early 2008 Mac Pro, each containing a progressively later version of OS X from Snow Leapord to El Capitan. I’ve been recording using LPX 10.2.1 since it came out with seemingly no problems. This afternoon I opened a project that I was working on about 2 months ago that started off in LPX 10.2.0. It’s a relatively complex project that uses the automation in the DM3200 and not too many plug-ins in LPX. When I started to play the tune I noticed that the drums were severely distorted. At first i thought that I had accidently left a gate on that was right on the edge of it’s threshold but then remembered that I had loaded the snapshot and automation files from the DM3200 CF card. I went through each track and checked anyway. All the gates were off. I increased the I/O Buffer size to see if that was the issue (although I had worked on this track with no problems so far)> It didn’t help.

Most of the tracks were recorded in Stereo except for the individual, close mic’d drum tracks which were recorded in mono and were the ones that were distorting. I had each drum assigned to a mono track in LPX which was then sent to a separate channel on the DM3200 so that each track followed a mono signal path straight through to the board. After about an hour of checking everything that i could think of, I reassigned the drum tracks to outputs 9/10 (a stereo output group) in Logic Pro X. Amazing! The tracks played normally. I then reassigned the tracks to their original, mono outputs and the distortion returned! BUT ONLY IN THE EVEN NUMBERED CHANNELS!. If I assigned a mono drum to channel 7 or 9 it sounded great but if I reassigned it to channel 8 or 10 it was severely distorted.

I then rebooted into Yosemite to see if the problem persisted. I experienced the same issue and then realized that I was also running LPX 10.2.1 in that system as well. So I rebooted into Mavericks which is running LPX 10.2.0 and everything worked normally. Very strange. Any thoughts?
 
Well, thoughts.. All I can think of is that between Logic 10.2.0 and 10.2.1 there has been a change in its way of communicating with the IF/FW audio driver. Can't see how anything else could be responsible. Maybe you can find other Logic users with a similar experience?
 
I've seem similar issues that happen occasionally to me with a UAD Apollo and using both Digital Performer and Pro Tools. I'm pretty sure it's OS level to be honest as it only started happening for me in Yosemite. Usually a reboot solves the issues for me.

Out of curiousity what driver version are you running for the DM-3200?
 
I don't think I'm running a driver for the DM-3200 itself but the driver for my IF/FW-DMMKII is the latest from the Beta page, 1.30f10.
 
There is no driver for the DM3200 (other than it's USB MIDI compliant port).
F10 is the latest and greatest BETA for the MAC OS, F9 for Windows.
 

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