Hi all, ;-) I've been using my DM for years now, but today it stopped it's output..... What I did: I bought a Line6 Helix and wanted that to use as an aggregate input for in Cubase (9.5) The sample rates weren't right (Cubase 44.1/Helix 48) so I figured out that in my Audi/midi config (I'm on a Mac pro early 2008/El Capitan) the sample rates of the Helix couldn't be changed (to 44.1) so for that I had to download the newest driver for it: now that works and I could change it to 44.1 Line6 provide a warning: IMPORTANT! Installing the Helix Mac Driver 1.0.7 precludes using Helix with the class-compliant OS X Core Audio driver. and: If for whatever reason you want to uninstall the Helix Mac Driver: 1. Navigate to Macintosh HD/Library/Extensions. Inside the Extensions folder, you should see an item named "L6Helix.kext." Drag this file to the trash. 2. Empty the trash and restart your computer. Helix will return to using the class-compliant OS X Core Audio driver. Known Issues - In rare occasions, loss of audio occurs after waking your computer from sleep - Audio artifacts may occur while adjusting UI controls in several DAW applications Indeed, my DM stopped working, so I uninstalled the Helix driver, but after that the DM still didn't gave output: I can see the signal coming in on the meterbridge: the led-bars move, when I play something trough iTunes, it's like I forgot to switch the amp on....... I then also re-installed the IF-FW/DM MKll driver with the same result: no sound, but meters light up. So before I go fiddling in the menu's of the DM (which is quite difficult, since it has a lot of blue lines in the screen) I thought, maybe first go here and some helpful person can help me out ;-) Thanks in advance, Chris.